diff --git a/Dockerfile.cpu b/Dockerfile.cpu
index 8cc83e6..7dab635 100644
--- a/Dockerfile.cpu
+++ b/Dockerfile.cpu
@@ -7,6 +7,7 @@ WORKDIR /subgen
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ffmpeg \
     git \
+    tzdata \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy and install dependencies