diff --git a/docker/nginx/scripts/gen-self-signed-cert.sh b/docker/nginx/scripts/gen-self-signed-cert.sh
index 78fd57d..7667943 100755
--- a/docker/nginx/scripts/gen-self-signed-cert.sh
+++ b/docker/nginx/scripts/gen-self-signed-cert.sh
@@ -26,7 +26,7 @@ echo "Creating self-signed certificate valid for ${DAYS_VALID} days for domain $
     openssl \
     req -x509 \
     -nodes \
-    -subj "/CN=${DOMAIN_NAME}}" \
+    -subj "/CN=${DOMAIN_NAME}" \
     -addext "subjectAltName=DNS:${DOMAIN_NAME}" \
     -days ${DAYS_VALID} \
     -newkey rsa:4096 -keyout "${KEY_FILE}" \