diff --git a/Dockerfile b/Dockerfile
index 9e39832..6c1f543 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,6 @@
 FROM alpine:latest
-RUN apk add openssl
-CMD openssl ocsp -port $OCSP_INT_PORT -text -index $INDEX_FILE -CA $CA_FILE -rsigner $OCSP_CERT_FILE -rkey $OCSP_KEY_FILE -out $OCSP_LOG_FILE
+
+RUN apk update && apk upgrade #Fully update the image
+RUN apk add openssl #Install OpenSSL
+
+CMD ["openssl ocsp -port $OCSP_INT_PORT -text -index $INDEX_FILE -CA $CA_FILE -rsigner $OCSP_CERT_FILE -rkey $OCSP_KEY_FILE -out $OCSP_LOG_FILE"]