diff --git a/paperless_ngx/Dockerfile b/paperless_ngx/Dockerfile
index 051346099..3a1aef4e3 100644
--- a/paperless_ngx/Dockerfile
+++ b/paperless_ngx/Dockerfile
@@ -17,7 +17,7 @@
 ARG BUILD_FROM
 ARG BUILD_VERSION
 ARG BUILD_UPSTREAM="1.9.2"
-FROM ${BUILD_FROM}${BUILD_UPSTREAM}
+FROM ${BUILD_FROM}:${BUILD_UPSTREAM}
 
 ##################
 # 2 Modify Image #