diff --git a/prost-build/Cargo.toml b/prost-build/Cargo.toml
index f706ef87f..7bb9c4ea7 100644
--- a/prost-build/Cargo.toml
+++ b/prost-build/Cargo.toml
@@ -31,7 +31,7 @@ syn = { version = "2", features = ["full"], optional = true }
 
 # These two must be kept in sync, used for `cleanup-markdown` feature.
 pulldown-cmark = { version = "0.13", optional = true, default-features = false }
-pulldown-cmark-to-cmark = { version = "21", optional = true }
+pulldown-cmark-to-cmark = { version = "22", optional = true }
 
 [dev-dependencies]
 env_logger = { version = "0.11", default-features = false }