diff --git a/prost-build/Cargo.toml b/prost-build/Cargo.toml
index d53eb80c4..4fd9cd336 100644
--- a/prost-build/Cargo.toml
+++ b/prost-build/Cargo.toml
@@ -33,7 +33,7 @@ syn = { version = "2", features = ["full"], optional = true }
 
 # These two must be kept in sync, used for `cleanup-markdown` feature.
 pulldown-cmark = { version = "0.12", optional = true, default-features = false }
-pulldown-cmark-to-cmark = { version = "16", optional = true }
+pulldown-cmark-to-cmark = { version = ">=16, <=17", optional = true }
 
 [dev-dependencies]
 env_logger = { version = "0.11", default-features = false }