diff --git a/docker/Dockerfile.step-ca b/docker/Dockerfile.step-ca
index bccb493c..b54f68b1 100644
--- a/docker/Dockerfile.step-ca
+++ b/docker/Dockerfile.step-ca
@@ -1,4 +1,4 @@
-FROM smallstep/step-cli:latest
+FROM smallstep/step-cli:0.9.0
 
 ARG BINPATH="bin/step-ca"