diff --git a/Cargo.toml b/Cargo.toml
index f8cc8c584f..0d93b0db7c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -94,7 +94,7 @@ zstd = "0.12.4"
 # put all inter-workspace libraries, i.e. those that use 'path = ...' here in
 # their own (alphabetically sorted) block
 
-jj-lib = { path = "lib" }
+jj-lib = { path = "lib", version = "0.9.0" }
 testutils = { path = "lib/testutils" }
 
 [profile.release]