diff --git a/.github/renovate.json b/.github/renovate.json
index ca427fa..db2a7f7 100644
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -8,7 +8,8 @@
       "fileMatch": ["(^|/|\\.)Dockerfile$"],
       "matchStrings": ["ENV MAILPIT_VERSION=(?<currentValue>.*?)\n"],
       "depNameTemplate": "axllent/mailpit",
-      "datasourceTemplate": "github-releases"
+      "datasourceTemplate": "github-releases",
+      "extractVersionTemplate": "^{{{depName}}}\/(?<version>.*)$"
     }
   ]
 }
diff --git a/Dockerfile b/Dockerfile
index fba022d..2219bf2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG MAILPIT_VERSION=v1.20.0
+ARG MAILPIT_VERSION=1.20.0
 
 #
 # Mailpit binary
@@ -8,7 +8,7 @@ FROM golang:alpine AS mailpit-builder
 ARG MAILPIT_VERSION
 WORKDIR /app
 
-ADD https://github.com/axllent/mailpit/archive/refs/tags/${MAILPIT_VERSION}.tar.gz .
+ADD https://github.com/axllent/mailpit/archive/refs/tags/v${MAILPIT_VERSION}.tar.gz .
 
 RUN apk add --no-cache git npm
 RUN tar --strip-components=1 -zxf v${MAILPIT_VERSION}.tar.gz -C .