diff --git a/Dockerfile b/Dockerfile
index bfd46086c..27b816ca5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -57,7 +57,7 @@ ENV VIKUNJA_SENTRY_ENABLED false
 ENV VIKUNJA_SENTRY_DSN https://85694a2d757547cbbc90cd4b55c5a18d@o1047380.ingest.sentry.io/6024480
 ENV VIKUNJA_PROJECT_INFINITE_NESTING_ENABLED false
 ENV VIKUNJA_ALLOW_ICON_CHANGES true
-ENV VIKUNJA_CUSTOM_LOGO_URL ""
+ENV VIKUNJA_CUSTOM_LOGO_URL "''"
 
 COPY docker/injector.sh /docker-entrypoint.d/50-injector.sh
 COPY docker/ipv6-disable.sh /docker-entrypoint.d/60-ipv6-disable.sh