diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index f37186d..6e6c424 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -33,9 +33,9 @@ jobs:
       matrix:
         golangci_lint: [v1.38]
     steps:
-      - uses: actions/checkout@v3.1.0
+      - uses: actions/checkout@v3.6.0
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3.2.0
+        uses: golangci/golangci-lint-action@v3.7.0
         with:
           version: ${{ matrix.golangci_lint }}
           args: --timeout=2m
@@ -52,12 +52,12 @@ jobs:
       OS: ubuntu-latest
       GOLANG: ${{ matrix.golang }}
     steps:
-      - uses: actions/checkout@v3.1.0
+      - uses: actions/checkout@v3.6.0
       - name: Install Go
         uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.golang }}
-      - uses: actions/cache@v3.0.4
+      - uses: actions/cache@v3.3.1
         with:
           path: ~/go/pkg/mod
           key:          ${{ runner.os }}-go-${{ matrix.golang }}-v1-${{ hashFiles('**/go.sum') }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4c46d65..e8fd5bc 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,8 +6,8 @@ jobs:
   semantic-release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.1.0
-      - uses: codfish/semantic-release-action@v1.9.0
+      - uses: actions/checkout@v3.6.0
+      - uses: codfish/semantic-release-action@v1.10.0
         if: github.ref == 'refs/heads/master'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/Dockerfile b/Dockerfile
index f346c81..87987c7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ ARG             VCS_REF
 ARG             VERSION
 
 # build
-FROM            golang:1.20.1-alpine as builder
+FROM            golang:1.21.1-alpine as builder
 RUN             apk add --no-cache git gcc musl-dev make
 ENV             GO111MODULE=on
 WORKDIR         /go/src/moul.io/moulsay
@@ -14,7 +14,7 @@ COPY            . ./
 RUN             make install
 
 # minimalist runtime
-FROM            alpine:3.16.0
+FROM            alpine:3.18.3
 LABEL           org.label-schema.build-date=$BUILD_DATE \
                 org.label-schema.name="moulsay" \
                 org.label-schema.description="" \
diff --git a/go.mod b/go.mod
index 2b69a19..7d8977c 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,6 @@ go 1.16
 
 require (
 	github.com/eidolon/wordwrap v0.0.0-20161011182207-e0f54129b8bb
-	github.com/peterbourgon/ff/v3 v3.0.0
+	github.com/peterbourgon/ff/v3 v3.4.0
 	moul.io/asciimoul v1.1.0
 )
diff --git a/go.sum b/go.sum
index 9733e29..de04e9f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,11 +1,9 @@
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/eidolon/wordwrap v0.0.0-20161011182207-e0f54129b8bb h1:ioQwBmKdOCpMVS/bDaESqNWXIE/aw4+gsVtysCGMWZ4=
 github.com/eidolon/wordwrap v0.0.0-20161011182207-e0f54129b8bb/go.mod h1:ZAPs+OyRzeVJFGvXVDVffgCzQfjg3qU9Ig8G/MU3zZ4=
-github.com/pelletier/go-toml v1.6.0/go.mod h1:5N711Q9dKgbdkxHL+MEfF31hpT7l0S0s/t2kKREewys=
-github.com/peterbourgon/ff/v3 v3.0.0 h1:eQzEmNahuOjQXfuegsKQTSTDbf4dNvr/eNLrmJhiH7M=
-github.com/peterbourgon/ff/v3 v3.0.0/go.mod h1:UILIFjRH5a/ar8TjXYLTkIvSvekZqPm5Eb/qbGk6CT0=
+github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
+github.com/peterbourgon/ff/v3 v3.4.0 h1:QBvM/rizZM1cB0p0lGMdmR7HxZeI/ZrBWB4DqLkMUBc=
+github.com/peterbourgon/ff/v3 v3.4.0/go.mod h1:zjJVUhx+twciwfDl0zBcFzl4dW8axCRyXE/eKY9RztQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 moul.io/asciimoul v1.1.0 h1:eYfYiXljSe8Z6VO84N7x8rtZE1kTLK/HmU5q9eC+T+w=
 moul.io/asciimoul v1.1.0/go.mod h1:uyy5fnzliF2LQ+z7+tHZTnWzaajv8g6ZyLbBoNdDiko=