diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 68cb765d8..8ff773b76 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -184,6 +184,13 @@ jobs:
           config: e2e/java.json
           dry-run: true
 
+      - name: docker-builder (swift)
+        uses: ./
+        with:
+          command: docker-builder
+          config: e2e/swift.json
+          dry-run: true
+
       - name: binary-builder (python)
         uses: ./
         with:
diff --git a/Dockerfile b/Dockerfile
index c4c8b933f..11ac60f5d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,9 @@ ARG HELM_VERSION=3.4.0
 # renovate: datasource=adoptium-java depName=java
 ARG JAVA_VERSION=8.0.302+8
 
+# renovate: datasource=docker depName=swift versioning=loose
+ARG SWIFT_VERSION=5.5.2
+
 ARG DISTRO=latest
 RUN echo DISTRO=$DISTRO
 ENTRYPOINT ["echo" ]
diff --git a/e2e/swift.json b/e2e/swift.json
new file mode 100644
index 000000000..6fa198ef3
--- /dev/null
+++ b/e2e/swift.json
@@ -0,0 +1,5 @@
+{
+  "image": "swift",
+  "startVersion": "5.3",
+  "extractVersion": "^(?<version>\\d+\\.\\d+(?:\\.\\d+)?)$"
+}
diff --git a/renovate.json b/renovate.json
index f215b6740..fbe047cf2 100644
--- a/renovate.json
+++ b/renovate.json
@@ -15,6 +15,10 @@
       "extends": ["schedule:weekly"],
       "automerge": true,
       "separateMinorPatch": false
+    },
+    {
+      "matchPackageNames": ["swift"],
+      "extractVersion": "^(?<version>\\d+\\.\\d+(?:\\.\\d+)?)$"
     }
   ]
 }
diff --git a/src/commands/docker/builder.ts b/src/commands/docker/builder.ts
index c234c31c2..25c4d943e 100644
--- a/src/commands/docker/builder.ts
+++ b/src/commands/docker/builder.ts
@@ -58,10 +58,18 @@ async function getBuildList({
   if (!pkgResult) {
     return [];
   }
+
+  log(`Found ${pkgResult.releases.length} raw versions`);
+
   let allVersions = pkgResult.releases
     .map((v) => v.version)
     .filter((v) => ver.isVersion(v) && ver.isCompatible(v, startVersion));
 
+  log(
+    `Found ${allVersions.length} compatible versions:`,
+    allVersions.join(', ')
+  );
+
   // filter duplicate versions (16.0.2+7 == 16.0.2+8)
   allVersions = allVersions
     .reverse()
diff --git a/test/__snapshots__/util.spec.ts.snap b/test/__snapshots__/util.spec.ts.snap
index 2c4903cb2..b4373c01c 100644
--- a/test/__snapshots__/util.spec.ts.snap
+++ b/test/__snapshots__/util.spec.ts.snap
@@ -20,6 +20,9 @@ ARG HELM_VERSION=3.4.0
 # renovate: datasource=adoptium-java depName=java
 ARG JAVA_VERSION=8.0.302+8
 
+# renovate: datasource=docker depName=swift versioning=loose
+ARG SWIFT_VERSION=5.5.2
+
 ARG DISTRO=latest
 RUN echo DISTRO=$DISTRO
 ENTRYPOINT [\\"echo\\" ]
@@ -46,6 +49,9 @@ ARG HELM_VERSION=3.4.0
 # renovate: datasource=adoptium-java depName=java
 ARG JAVA_VERSION=8.0.302+8
 
+# renovate: datasource=docker depName=swift versioning=loose
+ARG SWIFT_VERSION=5.5.2
+
 ARG DISTRO=latest
 RUN echo DISTRO=$DISTRO
 ENTRYPOINT [\\"echo\\" ]