diff --git a/requirements-dev.txt b/requirements-dev.txt
index fdbc449..b522074 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,8 +1,6 @@
 colorama
 docutils
 flake8
-click
-lark-parser==0.11.1
 # git+git://github.com/erezsh/lark.git#egg=lark
 pluggy
 py
@@ -12,8 +10,6 @@ pytest
 pytest-cov
 tox
 virtualenv
-jsonschema
-jsonref==0.2
 glob2
 coveralls
 sphinx
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 7c14255..d65a036 100644
--- a/setup.py
+++ b/setup.py
@@ -38,7 +38,16 @@ def readme():
       author_email='sethg@geographika.co.uk',
       license='MIT',
       packages=['mappyfile'],
-      install_requires=['lark-parser==0.11.1', 'jsonschema >=2.0', 'jsonref==0.2', 'click'],
+      install_requires=[
+            'lark-parser>=0.9.0',
+            # pyrsistent is a dependency of jsonschema but py2 is not
+            # supported beyond 0.16.0
+            'pyrsistent<0.17.0; python_version=="2.7"',
+            'jsonschema>=2.0',
+            'jsonref==0.2',
+            'click; python_version>="3.0.0"',
+            'click < 8.0.0; python_version=="2.7"'
+      ],
       zip_safe=False,
       entry_points = {
         'console_scripts': ['mappyfile=mappyfile.cli:main'],