diff --git a/fireflyiii/Dockerfile b/fireflyiii/Dockerfile
index e4b3a4f8d..1474ff2ef 100644
--- a/fireflyiii/Dockerfile
+++ b/fireflyiii/Dockerfile
@@ -33,7 +33,7 @@ RUN \
     #################
     # Fix for 5.7.5 #
     #################
-    if [ "$BUILD_UPSTREAM" == "5.7.5" ] ; then \
+    if [ "$BUILD_UPSTREAM" = "5.7.5" ] ; then \
     sed -i "s|, \$transaction\[\x27amount\x27\] ?? \x270\x27);|, (string)(\$transaction\[\x27amount\x27\] ?? \x270\x27));|g" /var/www/html/app/Helpers/Collector/GroupCollector.php; else echo "not 5.7.5"; fi
 
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