diff --git a/Cargo.lock b/Cargo.lock
index f698d8d9de470..a8b84924f1e37 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -56,6 +56,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "allocator-api2"
 version = "0.2.16"
@@ -1285,8 +1294,8 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2895653b4d9f1538a83970077cb01dfc77a4810524e51a110944688e916b18e"
 dependencies = [
- "prost",
- "prost-types",
+ "prost 0.11.9",
+ "prost-types 0.11.9",
  "tonic",
  "tracing-core",
 ]
@@ -1303,7 +1312,7 @@ dependencies = [
  "futures",
  "hdrhistogram",
  "humantime",
- "prost-types",
+ "prost-types 0.11.9",
  "serde",
  "serde_json",
  "thread_local",
@@ -2410,7 +2419,7 @@ version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0a1e17342619edbc21a964c2afbeb6c820c6a2560032872f397bb97ea127bd0a"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 0.7.20",
  "bstr 0.2.14",
  "fnv",
  "log",
@@ -3606,7 +3615,7 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
+ "prost 0.11.9",
  "qcell",
  "rand",
  "rand_chacha",
@@ -3830,8 +3839,8 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rand",
  "serde",
@@ -3885,7 +3894,7 @@ dependencies = [
  "native-tls",
  "once_cell",
  "openssl",
- "prost-build",
+ "prost-build 0.12.3",
  "protobuf-src",
  "reqwest",
  "serde",
@@ -3983,8 +3992,8 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "regex",
  "serde",
@@ -4114,8 +4123,8 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "regex",
  "serde",
@@ -4145,8 +4154,8 @@ dependencies = [
  "mz-storage-types",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "timely",
@@ -4209,8 +4218,8 @@ dependencies = [
  "mz-proto",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "tracing",
@@ -4341,7 +4350,7 @@ dependencies = [
 name = "mz-expr"
 version = "0.0.0"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 0.7.20",
  "anyhow",
  "bytes",
  "bytesize",
@@ -4378,11 +4387,11 @@ dependencies = [
  "proc-macro2",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "regex",
- "regex-syntax",
+ "regex-syntax 0.6.28",
  "serde",
  "serde_json",
  "serde_regex",
@@ -4442,9 +4451,9 @@ dependencies = [
  "openssl",
  "postgres-openssl",
  "postgres-protocol",
- "prost",
- "prost-build",
- "prost-types",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
+ "prost-types 0.11.9",
  "protobuf-src",
  "serde",
  "serde_json",
@@ -4564,8 +4573,8 @@ dependencies = [
  "mz-repr",
  "once_cell",
  "ordered-float",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "prost-reflect",
  "protobuf-src",
  "serde_json",
@@ -4591,8 +4600,8 @@ dependencies = [
  "mz-ore",
  "mz-ssh-util",
  "num_cpus",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rand",
  "rdkafka",
@@ -4699,8 +4708,8 @@ dependencies = [
  "mz-ssh-util",
  "once_cell",
  "proptest",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "thiserror",
@@ -4736,7 +4745,7 @@ dependencies = [
  "derivative",
  "futures-core",
  "mz-ore",
- "prost",
+ "prost 0.11.9",
  "protobuf-src",
  "serde",
  "tonic-build",
@@ -4906,8 +4915,8 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rand",
  "serde",
@@ -4952,8 +4961,8 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "semver",
  "sentry-tracing",
@@ -4987,8 +4996,8 @@ dependencies = [
  "mz-persist-types",
  "mz-timely-util",
  "prometheus",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rand",
  "serde",
@@ -5013,8 +5022,8 @@ dependencies = [
  "parquet2",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "serde_json",
@@ -5088,8 +5097,8 @@ dependencies = [
  "phf_codegen",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "uncased",
@@ -5186,8 +5195,8 @@ dependencies = [
  "postgres-openssl",
  "postgres_array",
  "proptest",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "thiserror",
@@ -5220,8 +5229,8 @@ dependencies = [
  "mz-proc",
  "once_cell",
  "pprof",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "tempfile",
  "tikv-jemalloc-ctl",
@@ -5268,8 +5277,8 @@ dependencies = [
  "num",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "regex",
  "serde",
@@ -5326,8 +5335,8 @@ dependencies = [
  "postgres-protocol",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rand",
  "regex",
@@ -5377,8 +5386,8 @@ dependencies = [
  "prometheus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rocksdb",
  "serde",
@@ -5402,8 +5411,8 @@ dependencies = [
  "num_cpus",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "tonic-build",
@@ -5496,8 +5505,8 @@ dependencies = [
  "os_info",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "semver",
  "sentry-tracing",
@@ -5567,7 +5576,7 @@ dependencies = [
  "postgres_array",
  "proptest",
  "proptest-derive",
- "prost",
+ "prost 0.11.9",
  "protobuf-native",
  "rdkafka",
  "regex",
@@ -5727,7 +5736,7 @@ dependencies = [
  "postgres-openssl",
  "prometheus",
  "proptest",
- "prost",
+ "prost 0.11.9",
  "rand",
  "serde",
  "timely",
@@ -5755,7 +5764,7 @@ dependencies = [
  "mz-storage-types",
  "mz-tls-util",
  "once_cell",
- "prost",
+ "prost 0.11.9",
  "serde_json",
  "tokio",
  "tokio-postgres",
@@ -5773,7 +5782,7 @@ dependencies = [
  "mz-proto",
  "paste",
  "prometheus",
- "prost",
+ "prost 0.11.9",
  "serde",
  "tokio-postgres",
  "workspace-hack",
@@ -5841,7 +5850,7 @@ dependencies = [
  "once_cell",
  "postgres-protocol",
  "prometheus",
- "prost",
+ "prost 0.11.9",
  "protobuf-src",
  "rand",
  "rdkafka",
@@ -5891,8 +5900,8 @@ dependencies = [
  "once_cell",
  "prometheus",
  "proptest",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rdkafka",
  "serde",
@@ -5934,7 +5943,7 @@ dependencies = [
  "mz-tls-util",
  "once_cell",
  "proptest",
- "prost",
+ "prost 0.11.9",
  "serde",
  "serde_json",
  "timely",
@@ -6014,8 +6023,8 @@ dependencies = [
  "openssl",
  "proptest",
  "proptest-derive",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "rdkafka",
  "scopeguard",
@@ -6106,7 +6115,7 @@ dependencies = [
  "mz-tls-util",
  "once_cell",
  "postgres_array",
- "prost",
+ "prost 0.11.9",
  "prost-reflect",
  "protobuf-src",
  "rand",
@@ -6194,8 +6203,8 @@ dependencies = [
  "mz-ore",
  "mz-proto",
  "proptest",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.12.3",
  "protobuf-src",
  "serde",
  "tonic-build",
@@ -6580,7 +6589,7 @@ dependencies = [
  "opentelemetry-proto",
  "opentelemetry-semantic-conventions",
  "opentelemetry_sdk",
- "prost",
+ "prost 0.11.9",
  "thiserror",
  "tokio",
  "tonic",
@@ -6593,7 +6602,7 @@ source = "git+https://github.com/MaterializeInc/opentelemetry-rust?rev=9d300167e
 dependencies = [
  "opentelemetry",
  "opentelemetry_sdk",
- "prost",
+ "prost 0.11.9",
  "tonic",
 ]
 
@@ -7198,7 +7207,7 @@ dependencies = [
  "rand",
  "rand_chacha",
  "rand_xorshift",
- "regex-syntax",
+ "regex-syntax 0.6.28",
 ]
 
 [[package]]
@@ -7218,7 +7227,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b82eaa1d779e9a4bc1c3217db8ffbeabaae1dca241bf70183242128d48681cd"
 dependencies = [
  "bytes",
- "prost-derive",
+ "prost-derive 0.11.9",
+]
+
+[[package]]
+name = "prost"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "146c289cda302b98a28d40c8b3b90498d6e526dd24ac2ecea73e4e491685b94a"
+dependencies = [
+ "bytes",
+ "prost-derive 0.12.3",
 ]
 
 [[package]]
@@ -7235,14 +7254,36 @@ dependencies = [
  "multimap",
  "petgraph",
  "prettyplease 0.1.25",
- "prost",
- "prost-types",
+ "prost 0.11.9",
+ "prost-types 0.11.9",
  "regex",
  "syn 1.0.107",
  "tempfile",
  "which",
 ]
 
+[[package]]
+name = "prost-build"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c55e02e35260070b6f716a2423c2ff1c3bb1642ddca6f99e1f26d06268a0e2d2"
+dependencies = [
+ "bytes",
+ "heck",
+ "itertools",
+ "log",
+ "multimap",
+ "once_cell",
+ "petgraph",
+ "prettyplease 0.2.4",
+ "prost 0.12.3",
+ "prost-types 0.12.3",
+ "regex",
+ "syn 2.0.39",
+ "tempfile",
+ "which",
+]
+
 [[package]]
 name = "prost-derive"
 version = "0.11.9"
@@ -7256,6 +7297,19 @@ dependencies = [
  "syn 1.0.107",
 ]
 
+[[package]]
+name = "prost-derive"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efb6c9a1dd1def8e2124d17e83a20af56f1570d6c2d2bd9e266ccb768df3840e"
+dependencies = [
+ "anyhow",
+ "itertools",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.39",
+]
+
 [[package]]
 name = "prost-reflect"
 version = "0.11.4"
@@ -7264,8 +7318,8 @@ checksum = "000e1e05ebf7b26e1eba298e66fe4eee6eb19c567d0ffb35e0dd34231cdac4c8"
 dependencies = [
  "base64 0.21.5",
  "once_cell",
- "prost",
- "prost-types",
+ "prost 0.11.9",
+ "prost-types 0.11.9",
  "serde",
  "serde-value",
 ]
@@ -7276,7 +7330,16 @@ version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "213622a1460818959ac1181aaeb2dc9c7f63df720db7d788b3e24eacd1983e13"
 dependencies = [
- "prost",
+ "prost 0.11.9",
+]
+
+[[package]]
+name = "prost-types"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "193898f59edcf43c26227dcd4c8427f00d99d61e95dcde58dabd49fa291d470e"
+dependencies = [
+ "prost 0.12.3",
 ]
 
 [[package]]
@@ -7523,13 +7586,13 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.7.0"
+version = "1.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"
+checksum = "d0ab3ca65655bb1e41f2a8c8cd662eb4fb035e67c3f78da1d61dffe89d07300f"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 1.1.2",
  "memchr",
- "regex-syntax",
+ "regex-syntax 0.7.5",
 ]
 
 [[package]]
@@ -7539,7 +7602,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae1ded71d66a4a97f5e961fd0cb25a5f366a42a41570d16a763a69c092c26ae4"
 dependencies = [
  "byteorder",
- "regex-syntax",
+ "regex-syntax 0.6.28",
 ]
 
 [[package]]
@@ -7560,6 +7623,12 @@ version = "0.6.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
 
+[[package]]
+name = "regex-syntax"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
+
 [[package]]
 name = "reqwest"
 version = "0.11.13"
@@ -9110,7 +9179,7 @@ dependencies = [
  "hyper-timeout",
  "percent-encoding",
  "pin-project",
- "prost",
+ "prost 0.11.9",
  "tokio",
  "tokio-stream",
  "tower",
@@ -9126,7 +9195,7 @@ source = "git+https://github.com/MaterializeInc/tonic?rev=0d86e360ab45779770ca15
 dependencies = [
  "prettyplease 0.1.25",
  "proc-macro2",
- "prost-build",
+ "prost-build 0.11.9",
  "quote",
  "syn 1.0.107",
 ]
@@ -9963,15 +10032,15 @@ dependencies = [
  "postgres-types",
  "predicates",
  "proc-macro2",
- "prost",
+ "prost 0.11.9",
  "prost-reflect",
- "prost-types",
+ "prost-types 0.11.9",
  "quote",
  "rand",
  "rand_chacha",
  "rdkafka-sys",
  "regex",
- "regex-syntax",
+ "regex-syntax 0.6.28",
  "reqwest",
  "ring",
  "schemars",
diff --git a/src/catalog/Cargo.toml b/src/catalog/Cargo.toml
index 345b8016cadcc..bb7cf7370224e 100644
--- a/src/catalog/Cargo.toml
+++ b/src/catalog/Cargo.toml
@@ -74,7 +74,7 @@ tokio-postgres = { version = "0.7.8" }
 anyhow = "1.0.66"
 md-5 = "0.10.5"
 protobuf-src = "1.1.0"
-prost-build = "0.11.9"
+prost-build = "0.12.3"
 serde = "1.0.152"
 serde_json = "1.0.89"
 
diff --git a/src/ccsr/Cargo.toml b/src/ccsr/Cargo.toml
index 0f2d587318a3b..3cb880b502de8 100644
--- a/src/ccsr/Cargo.toml
+++ b/src/ccsr/Cargo.toml
@@ -32,7 +32,7 @@ tokio = { version = "1.32.0", features = ["macros"] }
 tracing = "0.1.37"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/cluster-client/Cargo.toml b/src/cluster-client/Cargo.toml
index 73bc78e4391d0..a8864a55f334a 100644
--- a/src/cluster-client/Cargo.toml
+++ b/src/cluster-client/Cargo.toml
@@ -35,7 +35,7 @@ uuid = { version = "1.7.0", features = ["serde", "v4"] }
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/compute-client/Cargo.toml b/src/compute-client/Cargo.toml
index daba9917b39f8..3019cce8dbafe 100644
--- a/src/compute-client/Cargo.toml
+++ b/src/compute-client/Cargo.toml
@@ -54,7 +54,7 @@ uuid = { version = "1.7.0", features = ["serde", "v4"] }
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/compute-types/Cargo.toml b/src/compute-types/Cargo.toml
index 62f95ddc841a5..31ecddd2a6d48 100644
--- a/src/compute-types/Cargo.toml
+++ b/src/compute-types/Cargo.toml
@@ -27,7 +27,7 @@ tracing = "0.1.37"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/dyncfg/Cargo.toml b/src/dyncfg/Cargo.toml
index bfda8b32152ce..69a1dc177e78a 100644
--- a/src/dyncfg/Cargo.toml
+++ b/src/dyncfg/Cargo.toml
@@ -21,7 +21,7 @@ tracing = "0.1.37"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/expr/Cargo.toml b/src/expr/Cargo.toml
index db8269330b181..4c68786287f04 100644
--- a/src/expr/Cargo.toml
+++ b/src/expr/Cargo.toml
@@ -72,7 +72,7 @@ mz-ore = { path = "../ore" }
 proc-macro2 = "1.0.60"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/fivetran-destination/Cargo.toml b/src/fivetran-destination/Cargo.toml
index ca17518520809..63572884b36fb 100644
--- a/src/fivetran-destination/Cargo.toml
+++ b/src/fivetran-destination/Cargo.toml
@@ -41,7 +41,7 @@ workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 insta = "1.32"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/interchange/Cargo.toml b/src/interchange/Cargo.toml
index 197a5cb614f03..5f5e9f0cafb8d 100644
--- a/src/interchange/Cargo.toml
+++ b/src/interchange/Cargo.toml
@@ -43,7 +43,7 @@ criterion = { version = "0.4.0", features = ["async_tokio"] }
 tokio = { version = "1.32.0", features = ["macros"] }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/kafka-util/Cargo.toml b/src/kafka-util/Cargo.toml
index 819bdd0d799f6..5e4e5ac391a73 100644
--- a/src/kafka-util/Cargo.toml
+++ b/src/kafka-util/Cargo.toml
@@ -33,7 +33,7 @@ url = "2.3.1"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/mysql-util/Cargo.toml b/src/mysql-util/Cargo.toml
index 50b51a3511595..c74f490cf28a0 100644
--- a/src/mysql-util/Cargo.toml
+++ b/src/mysql-util/Cargo.toml
@@ -28,7 +28,7 @@ uuid = { version = "1.7.0", features = ["v4"] }
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/persist-client/Cargo.toml b/src/persist-client/Cargo.toml
index c20542320a86f..4169e1dbac645 100644
--- a/src/persist-client/Cargo.toml
+++ b/src/persist-client/Cargo.toml
@@ -73,7 +73,7 @@ num_cpus = "1.14.0"
 tempfile = "3.8.1"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/persist-txn/Cargo.toml b/src/persist-txn/Cargo.toml
index 360c519e0d784..98a2d94241c51 100644
--- a/src/persist-txn/Cargo.toml
+++ b/src/persist-txn/Cargo.toml
@@ -33,7 +33,7 @@ crossbeam-channel = "0.5.8"
 rand = { version = "0.8.5", default-features = false, features = ["small_rng"] }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/persist-types/Cargo.toml b/src/persist-types/Cargo.toml
index 1eff8f89bcb79..b884946dbdb50 100644
--- a/src/persist-types/Cargo.toml
+++ b/src/persist-types/Cargo.toml
@@ -31,7 +31,7 @@ workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 proptest = { version = "1.0.0", default-features = false, features = ["std"] }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/persist/Cargo.toml b/src/persist/Cargo.toml
index 6ef5fd3eac522..5e6a2e0236ee9 100644
--- a/src/persist/Cargo.toml
+++ b/src/persist/Cargo.toml
@@ -66,7 +66,7 @@ serde_json = "1.0.89"
 tempfile = "3.8.1"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/pgtz/Cargo.toml b/src/pgtz/Cargo.toml
index 580cc5b0211b0..c888a7b078cf8 100644
--- a/src/pgtz/Cargo.toml
+++ b/src/pgtz/Cargo.toml
@@ -28,7 +28,7 @@ anyhow = "1.0.66"
 chrono-tz = { version = "0.8.1", features = ["serde", "case-insensitive"] }
 mz-ore = { path = "../ore" }
 phf_codegen = "0.11.1"
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 uncased = "0.9.7"
 
diff --git a/src/postgres-util/Cargo.toml b/src/postgres-util/Cargo.toml
index fa9cf4a52840c..26d4659002f2f 100644
--- a/src/postgres-util/Cargo.toml
+++ b/src/postgres-util/Cargo.toml
@@ -50,7 +50,7 @@ tunnel = [
 ]
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/prof/Cargo.toml b/src/prof/Cargo.toml
index 9f9ee820d353e..4f3b75f6c1cab 100644
--- a/src/prof/Cargo.toml
+++ b/src/prof/Cargo.toml
@@ -28,7 +28,7 @@ workspace-hack = { version = "0.0.0", path = "../workspace-hack", optional = tru
 
 [build-dependencies]
 anyhow = "1.0.66"
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [features]
diff --git a/src/proto/Cargo.toml b/src/proto/Cargo.toml
index 3f5e51dace6a1..ac8e8c89f821c 100644
--- a/src/proto/Cargo.toml
+++ b/src/proto/Cargo.toml
@@ -33,7 +33,7 @@ workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 chrono = ["dep:chrono", "dep:chrono-tz"]
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [package.metadata.cargo-udeps.ignore]
diff --git a/src/repr/Cargo.toml b/src/repr/Cargo.toml
index 3d9161b6568b9..36951913ac328 100644
--- a/src/repr/Cargo.toml
+++ b/src/repr/Cargo.toml
@@ -72,7 +72,7 @@ mz-persist = { path = "../persist" }
 rand = "0.8.5"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 
 [features]
diff --git a/src/rocksdb-types/Cargo.toml b/src/rocksdb-types/Cargo.toml
index b474a8da0dc3b..81962cde687b7 100644
--- a/src/rocksdb-types/Cargo.toml
+++ b/src/rocksdb-types/Cargo.toml
@@ -22,7 +22,7 @@ uncased = "0.9.7"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/rocksdb/Cargo.toml b/src/rocksdb/Cargo.toml
index 72673bd88bc11..017d65bb0af22 100644
--- a/src/rocksdb/Cargo.toml
+++ b/src/rocksdb/Cargo.toml
@@ -37,7 +37,7 @@ uncased = "0.9.7"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/service/Cargo.toml b/src/service/Cargo.toml
index 5b94f30e2a45c..45315279497d0 100644
--- a/src/service/Cargo.toml
+++ b/src/service/Cargo.toml
@@ -44,7 +44,7 @@ sentry-tracing = "0.29.1"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/storage-client/Cargo.toml b/src/storage-client/Cargo.toml
index 0a785d2be5410..56056b0a84187 100644
--- a/src/storage-client/Cargo.toml
+++ b/src/storage-client/Cargo.toml
@@ -57,7 +57,7 @@ tracing = "0.1.37"
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/storage-types/Cargo.toml b/src/storage-types/Cargo.toml
index cb1865e5adbdd..5a4a72643cb5b 100644
--- a/src/storage-types/Cargo.toml
+++ b/src/storage-types/Cargo.toml
@@ -68,7 +68,7 @@ workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 base64 = "0.13.1"
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"
 
diff --git a/src/tracing/Cargo.toml b/src/tracing/Cargo.toml
index 057c361b0a2ed..87ffa93707378 100644
--- a/src/tracing/Cargo.toml
+++ b/src/tracing/Cargo.toml
@@ -21,7 +21,7 @@ tracing-subscriber = { version = "0.3.16", default-features = false, features =
 workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
 
 [build-dependencies]
-prost-build = "0.11.2"
+prost-build = "0.12.3"
 protobuf-src = "1.1.0"
 tonic-build = "0.9.2"