diff --git a/Dockerfile b/Dockerfile
index 9626465d9e..9b1a1632cb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -58,7 +58,7 @@ ADD . calyx
 WORKDIR /home/calyx
 RUN cargo build --all && \
     cargo install vcdump && \
-    cargo install runt --version 0.4.1
+    cargo install runt --version 0.4.0
 
 # Install fud
 WORKDIR /home/calyx/fud