diff --git a/CHANGELOG.md b/CHANGELOG.md
index ffcb8e6..05d97e6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
 # Changelog
+## 5.12.3
+  * Update dependencies versions
 
 ## 5.12.2
   * Removes pinned `pytz` version [#152](https://github.com/singer-io/singer-python/pull/152)
diff --git a/setup.py b/setup.py
index cd5825c..0478a79 100755
--- a/setup.py
+++ b/setup.py
@@ -4,17 +4,17 @@
 import subprocess
 
 setup(name="singer-python",
-      version='5.12.2',
+      version='5.12.3',
       description="Singer.io utility library",
       author="Stitch",
       classifiers=['Programming Language :: Python :: 3 :: Only'],
       url="http://singer.io",
       install_requires=[
           'pytz>=2018.4',
-          'jsonschema==2.6.0',
-          'simplejson==3.11.1',
+          'jsonschema>=3.0,<4.0',
+          'simplejson>=3.11.1',
           'python-dateutil>=2.6.0',
-          'backoff==1.8.0',
+          'backoff>=1.8.0',
 	  'ciso8601',
       ],
       extras_require={