diff --git a/Dockerfile b/Dockerfile
index b619432..80e0900 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM alpine:3 AS builder
 
-ENV OCTANT_VERSION=0.17.0
+ENV OCTANT_VERSION=0.21.0
 ENV OCTANT_CHECKSUM=9f10ef7a0ae7f4dffa18da66d608c63c0116c6709eab1e0db75a17da3f165d98
 
 RUN apk update && \