diff --git a/src/change-by-example-spec.js b/src/change-by-example-spec.js
index 8b8d8f1..e3c7244 100644
--- a/src/change-by-example-spec.js
+++ b/src/change-by-example-spec.js
@@ -44,6 +44,36 @@ describe('change-by-example', () => {
     la(R.equals(output, expected), diff(expected, output).text)
   })
 
+  it('should not crash on non-strings', () => {
+    const source = {
+      name: {
+        first: 'joe',
+        last: 'smith'
+      }
+    }
+    const destination = {
+      name: {
+        first: 'joe'
+      }
+    }
+    finds(source, destination)
+  })
+
+  it('works with nested objects', () => {
+    const source = {
+      age: 42,
+      name: {
+        first: 'joe',
+        last: 'smith'
+      }
+    }
+    const destination = {
+      first: 'Joe',
+      last: 'Smith'
+    }
+    finds(source, destination)
+  })
+
   describe('delete property', () => {
     const source = {
       foo: 'f',
diff --git a/src/index.js b/src/index.js
index c639ab9..576aa5c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -32,12 +32,14 @@ function o2o (source, destination) {
     R.keys(source).some(key => {
       const sourceValue = source[key]
       const foundTransform = transforms.some(t => {
-        const out = t.f(sourceValue)
-        if (R.equals(value, out)) {
-          sourceKey = key
-          transform = t
-          return true
-        }
+        try {
+          const out = t.f(sourceValue)
+          if (R.equals(value, out)) {
+            sourceKey = key
+            transform = t
+            return true
+          }
+        } catch (e) {}
       })
       return foundTransform
     })