diff --git a/src/props/prop-set.js b/src/props/prop-set.js
index 9319532..23eba09 100644
--- a/src/props/prop-set.js
+++ b/src/props/prop-set.js
@@ -33,7 +33,7 @@ class PropSet {
     this.file = file;
     this.path = file.path;
     this.valueTransforms = valueTransforms;
-    this.options = _.merge({}, defaults, options);
+    this.options = _.assign({}, defaults, options);
 
     this._init();
   }
@@ -104,7 +104,7 @@ class PropSet {
   _resolveGlobals(def) {
     if (_.keys(def.global).length === 0) return;
     _.forEach(def.props, (prop, key) => {
-      def.props[key] = _.merge({}, def.global, prop);
+      def.props[key] = _.assign({}, def.global, prop);
     });
     delete def.global;
   }
@@ -182,8 +182,8 @@ class PropSet {
 
   _transformValue(prop, meta) {
     _.forEach(this.valueTransforms, v => {
-      let p = _.merge({}, prop);
-      let m = _.merge({}, meta);
+      let p = _.assign({}, prop);
+      let m = _.assign({}, meta);
       if (v.matcher(p, m) === true) {
         prop.value = v.transformer(p, m);
       }
diff --git a/test/props/mock/c.json b/test/props/mock/c.json
index bb0baf6..4fdf0ca 100644
--- a/test/props/mock/c.json
+++ b/test/props/mock/c.json
@@ -26,4 +26,4 @@
       "type": "color"
     }
   }
-}
\ No newline at end of file
+}
diff --git a/test/props/prop-set.js b/test/props/prop-set.js
index 16013f6..68dc29f 100644
--- a/test/props/prop-set.js
+++ b/test/props/prop-set.js
@@ -177,22 +177,28 @@ describe('PropSet', function() {
   });
 
   describe('#_resolveGlobals', function() {
-    it ('returns undefined if no keys were found in def.global', function() {
+    it('returns undefined if no keys were found in def.global', function() {
       var def = { global: {} };
       assert(set._resolveGlobals(def) === undefined);
     });
-    it ('merges def.global into each def.props', function() {
+    it('merges def.global into each def.props', function() {
       var def = { global: {foo:"bar"}, props: { a: { value:"hello" } } };
       set._resolveGlobals(def)
       assert(_.has(def.props.a, 'foo'));
       assert(def.props.a.foo === 'bar');
     });
-    it ('doesn\'t overwrite existing keys', function() {
+    it('doesn\'t overwrite existing keys', function() {
       var def = { global: {foo:"bar"}, props: { a: { foo:"baz" } } };
       set._resolveGlobals(def)
       assert(_.has(def.props.a, 'foo'));
       assert(def.props.a.foo === 'baz');
     });
+    it('doesn\'t merge object values', function() {
+      var def = { global: {foo:["a", "b", "c"]}, props: { a: { foo:["d"] } } };
+      set._resolveGlobals(def)
+      assert(_.has(def.props.a, 'foo'));
+      assert.deepEqual(def.props.a.foo, ['d']);
+    });
     it('removes the "global" key from the def', function() {
       var def = { global: {foo:"bar"}, props: { a: { foo:"baz" } } };
       set._resolveGlobals(def)
@@ -201,7 +207,7 @@ describe('PropSet', function() {
   });
 
   describe('#_resolveAliases', function() {
-    it ('replaces all instances of an alias in string values', function() {
+    it('replaces all instances of an alias in string values', function() {
       var def = {
         aliases: { sky: "blue", land: "green" },
         props: {
@@ -219,19 +225,19 @@ describe('PropSet', function() {
   });
 
   describe('#_resolveImports', function() {
-    it ('returns an empty array if no imports are found', function() {
+    it('returns an empty array if no imports are found', function() {
       var def = { props: {} };
       var imports = set._resolveImports(def);
       assert(_.isArray(imports));
       assert(imports.length === 0);
     });
-    it ('throws an error if an import is not found', function() {
+    it('throws an error if an import is not found', function() {
       var def = { props: {}, imports: ['./foo/bar.json'] };
       assert.throws(function() {
         set._resolveImports(def);
       });
     });
-    it ('returns an array of PropSets', function() {
+    it('returns an array of PropSets', function() {
       var imports = set._resolveImports(def);
       assert(_.isArray(imports));
       assert(imports.length === 2);