diff --git a/e2e/tsconfig.e2e.json b/e2e/tsconfig.e2e.json
index 1d9e5edf0965125ddb36005861f4c4b8cb0ddff1..a1af29b001311850be4f2cec89e12c5b1a5f9c4d 100644
--- a/e2e/tsconfig.e2e.json
+++ b/e2e/tsconfig.e2e.json
@@ -5,6 +5,7 @@
     "baseUrl": "./",
     "module": "commonjs",
     "target": "es5",
+    "downlevelIteration": true,
     "types": [
       "jasmine",
       "jasminewd2",
diff --git a/src/tsconfig.spec.json b/src/tsconfig.spec.json
index 18bad40ed42a304233bb8474c00ca104bb0835a1..23f020ba87f9e47b22d77e17db37bff95925646a 100644
--- a/src/tsconfig.spec.json
+++ b/src/tsconfig.spec.json
@@ -5,6 +5,7 @@
     "baseUrl": "./",
     "module": "commonjs",
     "target": "es5",
+    "downlevelIteration": true,
     "types": [
       "jasmine",
       "node"