diff --git a/src/evaluate.ts b/src/evaluate.ts
index 8d6c281a..7de5f27a 100644
--- a/src/evaluate.ts
+++ b/src/evaluate.ts
@@ -465,6 +465,11 @@ const evaluate_map = {
       "||": () => evaluate(node.left, scope) || evaluate(node.right, scope),
       "&&": () => evaluate(node.left, scope) && evaluate(node.right, scope)
     }[node.operator]();
+  },
+  ConditionalExpression: (node: types.ConditionalExpression, scope: Scope) => {
+    return evaluate(node.test, scope)
+      ? evaluate(node.consequent, scope)
+      : evaluate(node.alternate, scope);
   }
 };
 
diff --git a/test/ConditionalExpression.test.ts b/test/ConditionalExpression.test.ts
new file mode 100644
index 00000000..46134d09
--- /dev/null
+++ b/test/ConditionalExpression.test.ts
@@ -0,0 +1,30 @@
+import test from "ava";
+import * as fs from "fs";
+
+import vm from "../src/vm";
+
+test("ConditionalExpression-1", t => {
+  const sandbox: any = vm.createContext({});
+
+  const num: any = vm.runInContext(
+    `
+module.exports = true ? 1 : 2;
+  `,
+    sandbox
+  );
+
+  t.deepEqual(num, 1);
+});
+
+test("ConditionalExpression-or-2", t => {
+  const sandbox: any = vm.createContext({});
+
+  const num: any = vm.runInContext(
+    `
+module.exports = false ? 1 : 2;
+  `,
+    sandbox
+  );
+
+  t.deepEqual(num, 2);
+});