diff --git a/package.json b/package.json
index 904966a..158d3d4 100644
--- a/package.json
+++ b/package.json
@@ -1,32 +1,32 @@
 {
-  "name": "c4k-common-cljs",
-  "description": "Contains predicates and tools for c4k",
-  "author": "meissa GmbH",
-  "version": "0.2.0-SNAPSHOT",
-  "homepage": "https://gitlab.com/domaindrivenarchitecture/c4k-common#readme",
-  "repository": "https://www.npmjs.com/package/c4k-common",
-  "license": "APACHE2",
-  "main": "c4k-common.js",
-  "bin": {
-    "c4k-common": "./c4k-common.js"
-  },
-  "keywords": [
-    "cljs",
-    "k8s",
-    "c4k",
-    "deployment",
-    "yaml",
-    "convention4kubernetes"
-  ],
-  "bugs": {
-    "url": "https://gitlab.com/domaindrivenarchitecture/c4k-common/issues"
-  },
-  "dependencies": {
-    "js-base64": "^3.6.1",
-    "js-yaml": "^4.0.0"
-  },
-  "devDependencies": {
-    "shadow-cljs": "^2.11.18",
-    "source-map-support": "^0.5.19"
-  }
-}
+    "name": "c4k-common-cljs",
+    "description": "Contains predicates and tools for c4k",
+    "author": "meissa GmbH",
+    "version": "0.2.0-SNAPSHOT",
+    "homepage": "https://gitlab.com/domaindrivenarchitecture/c4k-common#readme",
+    "repository": "https://www.npmjs.com/package/c4k-common",
+    "license": "APACHE2",
+    "main": "c4k-common.js",
+    "bin": {
+        "c4k-common": "./c4k-common.js"
+    },
+    "keywords": [
+        "cljs",
+        "k8s",
+        "c4k",
+        "deployment",
+        "yaml",
+        "convention4kubernetes"
+    ],
+    "bugs": {
+        "url": "https://gitlab.com/domaindrivenarchitecture/c4k-common/issues"
+    },
+    "dependencies": {
+        "js-base64": "^3.7.2",
+        "js-yaml": "^4.0.0"
+    },
+    "devDependencies": {
+        "shadow-cljs": "^2.11.18",
+        "source-map-support": "^0.5.19"
+    }
+}
\ No newline at end of file
diff --git a/src/main/cljc/dda/c4k_common/predicate.cljc b/src/main/cljc/dda/c4k_common/predicate.cljc
index c76e9b5..da55f18 100644
--- a/src/main/cljc/dda/c4k_common/predicate.cljc
+++ b/src/main/cljc/dda/c4k_common/predicate.cljc
@@ -44,6 +44,12 @@
               (fqdn-string? (first split-string))
               (port-number? (edn/read-string (second split-string)))))))
 
+(defn integer-string?
+  [input]
+  (and (string? input)
+       (some? (re-matches #"^\d+$" input))
+       (integer? (edn/read-string input))))
+
 (defn string-sequence?
   [input]
   (and (sequential? input)
diff --git a/src/test/cljc/dda/c4k_common/predicate_test.cljc b/src/test/cljc/dda/c4k_common/predicate_test.cljc
index c91bb19..4ae1251 100644
--- a/src/test/cljc/dda/c4k_common/predicate_test.cljc
+++ b/src/test/cljc/dda/c4k_common/predicate_test.cljc
@@ -51,6 +51,15 @@
   (is (false? (cut/host-and-port-string? "test.123:1234")))
   (is (false? (cut/host-and-port-string? "test.de:abc"))))
 
+(deftest test-integer-string?
+  (is (true? (cut/integer-string? "1")))
+  (is (true? (cut/integer-string? "42")))
+  (is (false? (cut/integer-string? 42)))
+  (is (false? (cut/integer-string? "42.2")))
+  (is (false? (cut/integer-string? "4 2")))
+  (is (false? (cut/integer-string? "1e2")))
+  (is (false? (cut/integer-string? true))))
+
 (deftest test-string-sequence?
   (is (true? (cut/string-sequence? ["hallo" "welt" "!"])))
   (is (false? (cut/string-sequence? ["hallo" 1 "welt" "!"])))