diff --git a/CHANGELOG.md b/CHANGELOG.md
index 05bd7da577..fd865db5cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+Release v0.2.1 (2020-02-18)
+---------------------------
+
+### Bug Fixes
+
+- Fix a bug that short python_version markers can't be parsed correctly. [#38](https://github.com/frostming/pdm/issues/38)
+- Make `_editable_intall.py` compatible with Py2.
+
+
 Release v0.2.0 (2020-02-14)
 ---------------------------
 
diff --git a/pdm/__init__.py b/pdm/__init__.py
index d3ec452c31..3ced3581bb 100644
--- a/pdm/__init__.py
+++ b/pdm/__init__.py
@@ -1 +1 @@
-__version__ = "0.2.0"
+__version__ = "0.2.1"
diff --git a/pdm/models/markers.py b/pdm/models/markers.py
index 2ea4d65fdc..1aa61f14c7 100644
--- a/pdm/models/markers.py
+++ b/pdm/models/markers.py
@@ -144,11 +144,12 @@ def split_version(version):
             if key == "python_version":
                 if op == ">":
                     int_versions = [int(ver) for ver in version.split(".")]
-                    int_versions += 1
+                    int_versions[-1] += 1
                     version = ".".join(str(v) for v in int_versions)
                     op = ">="
                 elif op in ("==", "!="):
-                    version += ".*"
+                    if len(version.split(".")) < 3:
+                        version += ".*"
                 elif op in ("in", "not in"):
                     version = " ".join(v + ".*" for v in split_version(version))
             if op == "in":
diff --git a/pdm/models/specifiers.py b/pdm/models/specifiers.py
index ed527127df..0cf5b2f4f1 100644
--- a/pdm/models/specifiers.py
+++ b/pdm/models/specifiers.py
@@ -38,7 +38,7 @@ def bump_version(
 def _complete_version(
     version: Tuple[int, ...], complete_with: int = 0
 ) -> Tuple[int, ...]:
-    assert len(version) <= 3
+    assert len(version) <= 3, version
     return version + (3 - len(version)) * (complete_with,)
 
 
diff --git a/tests/models/test_requirements.py b/tests/models/test_requirements.py
index 7bd5e60e02..cfc36b9244 100644
--- a/tests/models/test_requirements.py
+++ b/tests/models/test_requirements.py
@@ -72,6 +72,11 @@
         ),
         f"demo[security] @ {FILE_PREFIX}" + (FIXTURES / "projects/demo").as_posix(),
     ),
+    (
+        'requests; python_version=="3.7.*"',
+        ("requests", {"version": "*", "marker": 'python_version == "3.7.*"'}),
+        'requests; python_version == "3.7.*"',
+    ),
 ]