diff --git a/Dockerfile b/Dockerfile
index fe876e3..223855f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -tags timetzdata -o ff3-import-helper
 FROM scratch AS final
 COPY --from=build /app/ff3-import-helper /
 COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-ENV TZ 'Etc/UTC'
+ENV TZ='Etc/UTC'
 LABEL org.opencontainers.image.source=https://github.com/james-prince/ff3-import-helper
 
 HEALTHCHECK --interval=10s --timeout=3s --start-period=20s \