diff --git a/core/src/plugins/kubernetes/container/build/kaniko.ts b/core/src/plugins/kubernetes/container/build/kaniko.ts
index aece4a8881..a01b9332c0 100644
--- a/core/src/plugins/kubernetes/container/build/kaniko.ts
+++ b/core/src/plugins/kubernetes/container/build/kaniko.ts
@@ -211,10 +211,10 @@ export const getKanikoFlags = (flags?: string[], topLevelFlags?: string[]): stri
     return DEFAULT_KANIKO_FLAGS
   }
   const flagToKey = (flag: string) => {
-    const found = flag.match(/--([a-zA-Z]*)/)
+    const found = flag.match(/--([a-zA-Z-]*)/)
     if (found === null) {
       throw new ConfigurationError({
-        message: `Invalid format for a kaniko flag. Expected it to match /--([a-zA-Z]*)/, actually got: ${flag}`,
+        message: `Invalid format for a kaniko flag. Expected it to match /--([a-zA-Z-]*)/, actually got: ${flag}`,
       })
     }
     return found[0]
diff --git a/core/test/unit/src/plugins/kubernetes/container/build/kaniko.ts b/core/test/unit/src/plugins/kubernetes/container/build/kaniko.ts
index b1c95605ae..ef53d1053f 100644
--- a/core/test/unit/src/plugins/kubernetes/container/build/kaniko.ts
+++ b/core/test/unit/src/plugins/kubernetes/container/build/kaniko.ts
@@ -228,6 +228,10 @@ describe("kaniko build", () => {
       expect(getKanikoFlags(["--myToggle"])).to.deep.equal(["--myToggle", "--cache=true"])
     })
 
+    it("should allow options with dashes", () => {
+      expect(getKanikoFlags(["--my-toggle", "--my-name=banana"])).to.deep.equal(["--my-toggle", "my-name=banana", "--cache=true"])
+    })
+
     it("should throw if a flag is malformed", () => {
       expect(() => getKanikoFlags(["--here=first", "-my-flag"])).to.throw(/Invalid format for a kaniko flag/)
     })