diff --git a/Dockerfile b/Dockerfile
index ce24fb5..2bdbcd0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,7 +22,7 @@ ENV LHCI_BASE_DIR=/drone/src \
 
 ADD overlay/ /
 
-RUN apt-get update && apt-get install -y git curl wget gnupg jq bash && \
+RUN apt-get update && apt-get install -y git curl wget gnupg jq bash bc && \
     curl -SsL -o /usr/local/bin/yq "https://github.com/mikefarah/yq/releases/download/${YQ_VERSION}/yq_linux_amd64" && \
     chmod 755 /usr/local/bin/yq && \
     wget -qO - "https://dl-ssl.google.com/linux/linux_signing_key.pub" | apt-key add - && \