diff --git a/Dockerfile.ci b/Dockerfile.ci
index 2cc1f9d..c249a77 100644
--- a/Dockerfile.ci
+++ b/Dockerfile.ci
@@ -12,6 +12,7 @@ WORKDIR /app/
 
 # Set environment variables
 ENV PATH="${PATH}:/app/tests/vendor/bin:/app/vendor/bin:/app/bin" \
+    COMPOSER_NO_SECURITY_BLOCKING=1 \
     SIMPLETEST_BASE_URL="http://localhost" \
     SIMPLETEST_DB="sqlite://sites/default/files/.ht.sqlite"