diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index ce0eca6b..eb4c8827 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -17,7 +17,7 @@ jobs:
     env:
       HADDOCK3_GHORG: "haddocking"
       HADDOCK3_VERSION: "main"
-      BARTENDER_VERSION: "main"
+      BARTENDER_VERSION: "v0.5.1"
       GDOCK_VERSION: "main"
       LIGHTDOCK_VERSION: "0.9.4"
     steps:
diff --git a/deploy/Dockerfile.bartenderhaddock3 b/deploy/Dockerfile.bartenderhaddock3
index 06d1d1f3..bb73d8e3 100644
--- a/deploy/Dockerfile.bartenderhaddock3
+++ b/deploy/Dockerfile.bartenderhaddock3
@@ -6,7 +6,7 @@ LABEL org.opencontainers.image.description="bartender web service with haddock3,
 
 ARG HADDOCK3_GHORG=haddocking
 ARG HADDOCK3_VERSION=main
-ARG BARTENDER_VERSION=main
+ARG BARTENDER_VERSION=v0.5.1
 ARG GDOCK_VERSION=main
 ARG LIGHTDOCK_VERSION=0.9.4
 ARG OPENMM_VERSION=8.1.2