diff --git a/extensions/armatak/Dockerfile b/extensions/armatak/Dockerfile.build
similarity index 89%
rename from extensions/armatak/Dockerfile
rename to extensions/armatak/Dockerfile.build
index c968a84..8c0ea4b 100644
--- a/extensions/armatak/Dockerfile
+++ b/extensions/armatak/Dockerfile.build
@@ -1,5 +1,5 @@
 # build Golang app for Linux
-FROM golang:latest
+FROM golang:1.20
 
 WORKDIR /app