diff --git a/CHANGELOG b/CHANGELOG
index 3a986c5..5e2b386 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+# 1.2.1
+- fix: merge should not throw an error with non-plain objects in sources
+
 # 1.2.0
 - feat: get
 - feat: isEmpty
diff --git a/package.json b/package.json
index 408ddf2..05099a4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bitfinex/lib-js-util-base",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "general utils",
   "main": "index.js",
   "scripts": {
diff --git a/src/merge.js b/src/merge.js
index 0ab0991..cb06ad8 100644
--- a/src/merge.js
+++ b/src/merge.js
@@ -29,6 +29,10 @@ const merge = (target, ...sources) => {
   const cloneObj = _cloneObj(target)
 
   for (const source of sources) {
+    if (!isPlainObject(source)) {
+      continue
+    }
+
     const keys = Object.keys(source)
 
     for (const key of keys) {
diff --git a/test/merge.js b/test/merge.js
index f6652cd..263c7cf 100644
--- a/test/merge.js
+++ b/test/merge.js
@@ -129,4 +129,11 @@ describe('merge', () => {
     circularObj.self = circularObj
     assert.deepStrictEqual(merge({}, circularObj), Object.assign({}, circularObj))
   })
+
+  it('should not throw an error with non-plain objects in sources', () => {
+    const expected = { a: 4 }
+    const actual = merge({ a: 1 }, expected, undefined, null, true, '', NaN, /x/, Symbol('a'))
+
+    assert.deepStrictEqual(actual, expected)
+  })
 })