diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 88995ed..18dbaf7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,7 +41,7 @@ jobs:
       - name: Setup Java (temurin@11)
         id: setup-java-temurin-11
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
@@ -54,7 +54,7 @@ jobs:
       - name: Setup Java (temurin@17)
         id: setup-java-temurin-17
         if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
@@ -119,7 +119,7 @@ jobs:
       - name: Setup Java (temurin@11)
         id: setup-java-temurin-11
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
@@ -132,7 +132,7 @@ jobs:
       - name: Setup Java (temurin@17)
         id: setup-java-temurin-17
         if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
@@ -157,7 +157,7 @@ jobs:
         env:
           PGP_SECRET: ${{ secrets.PGP_SECRET }}
           PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
-        run: echo $PGP_SECRET | base64 -di | gpg --import
+        run: echo $PGP_SECRET | base64 -d -i - | gpg --import
 
       - name: Import signing key and strip passphrase
         if: env.PGP_SECRET != '' && env.PGP_PASSPHRASE != ''
@@ -165,7 +165,7 @@ jobs:
           PGP_SECRET: ${{ secrets.PGP_SECRET }}
           PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
         run: |
-          echo "$PGP_SECRET" | base64 -di > /tmp/signing-key.gpg
+          echo "$PGP_SECRET" | base64 -d -i - > /tmp/signing-key.gpg
           echo "$PGP_PASSPHRASE" | gpg --pinentry-mode loopback --passphrase-fd 0 --import /tmp/signing-key.gpg
           (echo "$PGP_PASSPHRASE"; echo; echo) | gpg --command-fd 0 --pinentry-mode loopback --change-passphrase $(gpg --list-secret-keys --with-colons 2> /dev/null | grep '^sec:' | cut --delimiter ':' --fields 5 | tail -n 1)
 
@@ -193,7 +193,7 @@ jobs:
       - name: Setup Java (temurin@11)
         id: setup-java-temurin-11
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
@@ -206,7 +206,7 @@ jobs:
       - name: Setup Java (temurin@17)
         id: setup-java-temurin-17
         if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
@@ -236,7 +236,7 @@ jobs:
       - name: Setup Java (temurin@11)
         id: setup-java-temurin-11
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
@@ -263,7 +263,7 @@ jobs:
       - name: Setup Java (temurin@11)
         id: setup-java-temurin-11
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
@@ -276,7 +276,7 @@ jobs:
       - name: Setup Java (temurin@17)
         id: setup-java-temurin-17
         if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
diff --git a/build.sbt b/build.sbt
index 2deb983..39a6ae9 100644
--- a/build.sbt
+++ b/build.sbt
@@ -14,7 +14,7 @@ lazy val core = project
     name := "sbt-circe-org"
   )
 
-ThisBuild / tlBaseVersion := "0.2"
+ThisBuild / tlBaseVersion := "0.3"
 ThisBuild / crossScalaVersions := Seq("2.12.18")
 ThisBuild / developers := List(
   tlGitHubDev("lorandszakacs", "Loránd Szakács")
diff --git a/core/build.sbt b/core/build.sbt
index 1edeb3d..6f59ba4 100644
--- a/core/build.sbt
+++ b/core/build.sbt
@@ -1,4 +1,4 @@
-val sbtTypelevelVersion = "0.5.3" // https://github.com/typelevel/sbt-typelevel/releases
+val sbtTypelevelVersion = "0.6.4" // https://github.com/typelevel/sbt-typelevel/releases
 val sbtScoverageVersion = "2.0.9" // https://github.com/scoverage/sbt-scoverage/releases
 
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % sbtTypelevelVersion)
diff --git a/core/src/main/scala/io/circe/sbt/CirceOrgSitePlugin.scala b/core/src/main/scala/io/circe/sbt/CirceOrgSitePlugin.scala
index 1887c92..18b91a0 100644
--- a/core/src/main/scala/io/circe/sbt/CirceOrgSitePlugin.scala
+++ b/core/src/main/scala/io/circe/sbt/CirceOrgSitePlugin.scala
@@ -16,7 +16,6 @@
 
 package io.circe.sbt
 
-import cats.data.NonEmptyList
 import laika.ast.Path.Root
 import laika.ast._
 import laika.helium.config.Favicon
@@ -73,7 +72,8 @@ object CirceOrgSitePlugin extends AutoPlugin {
 
     ThemeNavigationSection(
       "Related Projects",
-      NonEmptyList.fromListUnsafe(mappings)
+      mappings.head,
+      mappings.tail *
     )
   }