diff --git a/types/transducers-js/transducers-js-tests.ts b/types/transducers-js/transducers-js-tests.ts
index 3e69ae06ed..f0f5facf41 100644
--- a/types/transducers-js/transducers-js-tests.ts
+++ b/types/transducers-js/transducers-js-tests.ts
@@ -161,12 +161,12 @@ function advancedIntoExample() {
   const string: string = into("", t.map((s: string) => s + s), ["a", "b"]);
   const object1: { [key: string]: number } = into(
     {},
-    t.map((s: string) => [s, s.length]),
+    t.map((s: string) => [s, s.length] as [string, number]),
     ["a", "b"],
   );
   const object2: { [key: string]: boolean } = into(
     {},
-    t.map((kv: [string, number]) => [kv[0], true]),
+    t.map((kv: [string, number]) => [kv[0], true] as [string, boolean]),
     { a: 1, b: 2 }
   );
 }
diff --git a/types/zipkin-context-cls/tsconfig.json b/types/zipkin-context-cls/tsconfig.json
index 57430d50b2..af624fda93 100644
--- a/types/zipkin-context-cls/tsconfig.json
+++ b/types/zipkin-context-cls/tsconfig.json
@@ -2,7 +2,8 @@
     "compilerOptions": {
         "module": "commonjs",
         "lib": [
-            "es6"
+            "es6",
+            "dom"
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
@@ -20,4 +21,4 @@
         "index.d.ts",
         "zipkin-context-cls-tests.ts"
     ]
-}
\ No newline at end of file
+}
diff --git a/types/zipkin-transport-http/tsconfig.json b/types/zipkin-transport-http/tsconfig.json
index 7ed663b14b..be30a49dab 100644
--- a/types/zipkin-transport-http/tsconfig.json
+++ b/types/zipkin-transport-http/tsconfig.json
@@ -2,7 +2,8 @@
     "compilerOptions": {
         "module": "commonjs",
         "lib": [
-            "es6"
+            "es6",
+            "dom"
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
@@ -20,4 +21,4 @@
         "index.d.ts",
         "zipkin-transport-http-tests.ts"
     ]
-}
\ No newline at end of file
+}