diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0cd8799..00ef96d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,9 +19,9 @@ jobs:
             lint: true
             coverage: true
             os: ubuntu-latest
-          - erlang: "23"
-            elixir: "1.12"
-            os: ubuntu-20.04
+          - erlang: "24"
+            elixir: "1.15"
+            os: ubuntu-22.04
 
     env:
       MIX_ENV: test
diff --git a/lib/hpax/huffman.ex b/lib/hpax/huffman.ex
index e337fab..574112f 100644
--- a/lib/hpax/huffman.ex
+++ b/lib/hpax/huffman.ex
@@ -76,7 +76,7 @@ defmodule HPAX.Huffman do
   # Use binary syntax for single match context optimization.
   def decode(<<padding::bitstring>>) when bit_size(padding) in 1..7 do
     padding_size = bit_size(padding)
-    <<padding::size(padding_size)>> = padding
+    <<padding::size(^padding_size)>> = padding
 
     if take_significant_bits(unquote(eos_bits), unquote(eos_bit_count), padding_size) == padding do
       <<>>
diff --git a/lib/hpax/types.ex b/lib/hpax/types.ex
index 8106555..a8915ab 100644
--- a/lib/hpax/types.ex
+++ b/lib/hpax/types.ex
@@ -47,7 +47,7 @@ defmodule HPAX.Types do
 
   @spec decode_integer(bitstring, 1..8) :: {:ok, non_neg_integer(), binary()} | :error
   def decode_integer(bitstring, prefix) when is_bitstring(bitstring) and prefix in 1..8 do
-    with <<value::size(prefix), rest::binary>> <- bitstring do
+    with <<value::size(^prefix), rest::binary>> <- bitstring do
       if value < power_of_two(prefix) - 1 do
         {:ok, value, rest}
       else
@@ -74,7 +74,7 @@ defmodule HPAX.Types do
   def decode_binary(binary) when is_binary(binary) do
     with <<huffman_bit::1, rest::bitstring>> <- binary,
          {:ok, length, rest} <- decode_integer(rest, 7),
-         <<contents::binary-size(length), rest::binary>> <- rest do
+         <<contents::binary-size(^length), rest::binary>> <- rest do
       contents =
         case huffman_bit do
           0 -> contents
diff --git a/mix.exs b/mix.exs
index a7ddaed..a943bd5 100644
--- a/mix.exs
+++ b/mix.exs
@@ -8,7 +8,7 @@ defmodule HPAX.MixProject do
     [
       app: :hpax,
       version: @version,
-      elixir: "~> 1.12",
+      elixir: "~> 1.15",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
 
diff --git a/mix.lock b/mix.lock
index 51efeff..e48d2cb 100644
--- a/mix.lock
+++ b/mix.lock
@@ -11,5 +11,5 @@
   "makeup_elixir": {:hex, :makeup_elixir, "1.0.1", "e928a4f984e795e41e3abd27bfc09f51db16ab8ba1aebdba2b3a575437efafc2", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "7284900d412a3e5cfd97fdaed4f5ed389b8f2b4cb49efc0eb3bd10e2febf9507"},
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.1", "c7f58c120b2b5aa5fd80d540a89fdf866ed42f1f3994e4fe189abebeab610839", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "8a89a1eeccc2d798d6ea15496a6e4870b75e014d1af514b1b71fa33134f57814"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
-  "stream_data": {:hex, :stream_data, "1.1.2", "05499eaec0443349ff877aaabc6e194e82bda6799b9ce6aaa1aadac15a9fdb4d", [:mix], [], "hexpm", "129558d2c77cbc1eb2f4747acbbea79e181a5da51108457000020a906813a1a9"},
+  "stream_data": {:hex, :stream_data, "1.2.0", "58dd3f9e88afe27dc38bef26fce0c84a9e7a96772b2925c7b32cd2435697a52b", [:mix], [], "hexpm", "eb5c546ee3466920314643edf68943a5b14b32d1da9fe01698dc92b73f89a9ed"},
 }