diff --git a/Cargo.lock b/Cargo.lock
index eca441470..f5a6e7b8b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -521,9 +521,9 @@ dependencies = [
 
 [[package]]
 name = "bitstream-io"
-version = "2.3.0"
+version = "2.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c12d1856e42f0d817a835fe55853957c85c8c8a470114029143d3f12671446e"
+checksum = "415f8399438eb5e4b2f73ed3152a3448b98149dda642a957ee704e1daa5cf1d8"
 
 [[package]]
 name = "block"
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 458cf4a7c..f636864df 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -13,7 +13,7 @@ workspace = true
 [dependencies]
 linkme = { version = "0.3", optional = true }
 byteorder = "1.5"
-bitstream-io = "2.3.0"
+bitstream-io = "2.4.2"
 flate2 = { workspace = true }
 fnv = "1.0.7"
 gc-arena = { package = "ruffle_gc_arena", path = "../ruffle_gc_arena" }
diff --git a/swf/Cargo.toml b/swf/Cargo.toml
index 1a9e0760f..d1b92f4de 100644
--- a/swf/Cargo.toml
+++ b/swf/Cargo.toml
@@ -13,7 +13,7 @@ workspace = true
 
 [dependencies]
 bitflags = { workspace = true }
-bitstream-io = "2.3.0"
+bitstream-io = "2.4.2"
 byteorder = "1.5"
 encoding_rs = "0.8.34"
 num-derive = { workspace = true }