diff --git a/bin/docker/Dockerfile b/bin/docker/Dockerfile
index d30f1f1c955727c3e0b174ec35ad0450d7d4564f..cd127de1a96d010f238b04acac4bca3daa23140d 100644
--- a/bin/docker/Dockerfile
+++ b/bin/docker/Dockerfile
@@ -1,6 +1,6 @@
 FROM eclipse-temurin:11-jre-alpine
 
-ENV FC_LANG en-US LC_CTYPE en_US.UTF-8
+ENV FC_LANG=en-US LC_CTYPE=en_US.UTF-8
 
 # dependencies
 RUN apk add -U bash ttf-dejavu fontconfig curl java-cacerts && \