diff --git a/Dockerfile b/Dockerfile
index 9554145..6fea7de 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,7 +20,7 @@ RUN mkdir /output && chown stduser:stdgroup /output
 VOLUME ["/output"]
 USER stduser
 
-HEALTHCHECK --interval=30s --timeout=5s --start-periode=15s --retries=3 CMD test -f /output/output.txt || exit 1
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 CMD test -f /output/output.txt || exit 1
 
 # Ausgabe wird ins Container-Dateisystem geschrieben
 ENTRYPOINT ["/bin/bash", "-c"]