diff --git a/Cargo.lock b/Cargo.lock
index 9363eb707d3c..cc8219bd06a7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4912,9 +4912,9 @@ dependencies = [
 
 [[package]]
 name = "prettydiff"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5240be0c9ea1bc7887819a36264cb9475eb71c58749808e5b989c8c1fdc67acf"
+checksum = "3bc9e8bdfe446d34975ff774fbb4a2b944d17054f6b5845ec132d4fb9ff8f559"
 dependencies = [
  "ansi_term 0.9.0",
  "prettytable-rs",
diff --git a/language/move-prover/test-utils/Cargo.toml b/language/move-prover/test-utils/Cargo.toml
index 44d88215d15a..5ed9ffabe410 100644
--- a/language/move-prover/test-utils/Cargo.toml
+++ b/language/move-prover/test-utils/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 license = "Apache-2.0"
 
 [dependencies]
-prettydiff = "0.3.1"
+prettydiff = "0.4.0"
 anyhow = "1.0.34"
 regex = "1.4.2"
 diem-workspace-hack = { path = "../../../common/workspace-hack", version = "0.1.0" }