debian/changelog

-mypy (0.670-2) UNRELEASED; urgency=medium
+mypy (0.670-2) unstable; urgency=medium
 
   * Include upstream's README.md in the the mypy binary package.
+  * Fix dependecy version between mypy and python3-mypy. Closes: #921990.
 
  -- Michael R. Crusoe <michael.crusoe@gmail.com>  Sun, 10 Feb 2019 00:25:00 -0800
 

debian/control

 Source: mypy
+Description: optional static typing for Python
 Maintainer: Debian Med Packaging Team <debian-med-packaging@lists.alioth.debian.org>
 Uploaders: Michael R. Crusoe <michael.crusoe@gmail.com>
 Section: utils
@@ -28,9 +29,9 @@ Package: mypy
 Architecture: all
 Depends: ${misc:Depends},
          ${python3:Depends},
-         python3-mypy
+         python3-mypy (= ${binary:Version})
 Suggests: mypy-doc
-Description: optional static typing for Python
+Description: ${source:Synopsis}
  Add type annotations to your Python programs, and use mypy to type check them.
  Mypy is essentially a Python linter on steroids, and it can catch many
  programming errors by analyzing your program, without actually having to run