@@ -6,12 +6,29 @@ environment:
     CYGWIN64_GIT_PATH: "C:\\cygwin64\\bin;%GIT_DAEMON_PATH%"
 
     matrix:
+      - PYTHON: "C:\\Python34-x64"
+        PYTHON_VERSION: "3.4"
+        GIT_PATH: "%GIT_DAEMON_PATH%"
+      - PYTHON: "C:\\Python35-x64"
+        PYTHON_VERSION: "3.5"
+        GIT_PATH: "%GIT_DAEMON_PATH%"
       - PYTHON: "C:\\Python36-x64"
         PYTHON_VERSION: "3.6"
         GIT_PATH: "%GIT_DAEMON_PATH%"
       - PYTHON: "C:\\Python37-x64"
         PYTHON_VERSION: "3.7"
         GIT_PATH: "%GIT_DAEMON_PATH%"
+      - PYTHON: "C:\\Miniconda35-x64"
+        PYTHON_VERSION: "3.5"
+        IS_CONDA: "yes"
+        MAYFAIL: "yes"
+        GIT_PATH: "%GIT_DAEMON_PATH%"
+        ## Cygwin
+      - PYTHON: "C:\\Python35-x64"
+        PYTHON_VERSION: "3.5"
+        IS_CYGWIN: "yes"
+        MAYFAIL: "yes"
+        GIT_PATH: "%CYGWIN64_GIT_PATH%"
 
 matrix:
     allow_failures:
@@ -59,10 +76,18 @@ install:
 build: false
 
 test_script:
-    -   nosetests -v
+    -   IF "%IS_CYGWIN%" == "yes" (
+            nosetests -v
+        ) ELSE (
+            IF "%PYTHON_VERSION%" == "3.5" (
+                nosetests -v --with-coverage
+            ) ELSE (
+                nosetests -v
+            )
+        )
 
 on_success:
-    - IF "%PYTHON_VERSION%" == "3.6" IF NOT "%IS_CYGWIN%" == "yes" (codecov)
+    - IF "%PYTHON_VERSION%" == "3.5" IF NOT "%IS_CYGWIN%" == "yes" (codecov)
 
 # Enable this to be able to login to the build worker. You can use the
 # `remmina` program in Ubuntu, use the login information that the line below
 
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2
@@ -61,4 +61,4 @@ jobs:
       run: |
         set -x
         pip install -r doc/requirements.txt
-        make -C doc html
+        make -C doc html
@@ -1,6 +1,8 @@
 # UNUSED, only for reference. If adjustments are needed, please see github actions
 language: python
 python:
+  - "3.4"
+  - "3.5"
   - "3.6"
   - "3.7"
   - "3.8"
@@ -36,7 +38,7 @@ script:
   - ulimit -n
   - coverage run --omit="test/*" -m unittest --buffer
   - coverage report
-  - if [ "$TRAVIS_PYTHON_VERSION" == '3.6' ]; then cd doc && make html; fi
+  - if [ "$TRAVIS_PYTHON_VERSION" == '3.5' ]; then cd doc && make html; fi
   - if [ "$TRAVIS_PYTHON_VERSION" == '3.6' ]; then flake8 --ignore=W293,E265,E266,W503,W504,E731; fi
 after_success:
   - codecov
@@ -34,7 +34,7 @@ If it is not in your `PATH`, you can help GitPython find it by setting
 the `GIT_PYTHON_GIT_EXECUTABLE=<path/to/git>` environment variable.
 
 * Git (1.7.x or newer)
-* Python >= 3.6
+* Python >= 3.5
 
 The list of dependencies are listed in `./requirements.txt` and `./test-requirements.txt`.
 The installer takes care of installing them for you.
 
@@ -13,7 +13,7 @@ The object database implementation is optimized for handling large quantities of
 Requirements
 ============
 
-* `Python`_ >= 3.6
+* `Python`_ >= 3.5
 * `Git`_ 1.7.0 or newer
     It should also work with older versions, but it may be that some operations
     involving remotes will not work as expected.
 
@@ -17,7 +17,9 @@
 import subprocess
 import sys
 import threading
+from collections import OrderedDict
 from textwrap import dedent
+import warnings
 
 from git.compat import (
     defenc,
@@ -1003,6 +1005,13 @@ def transform_kwarg(self, name: str, value: Any, split_single_char_options: bool
 
     def transform_kwargs(self, split_single_char_options: bool = True, **kwargs: Any) -> List[str]:
         """Transforms Python style kwargs into git command line options."""
+        # Python 3.6 preserves the order of kwargs and thus has a stable
+        # order. For older versions sort the kwargs by the key to get a stable
+        # order.
+        if sys.version_info[:2] < (3, 6):
+            kwargs = OrderedDict(sorted(kwargs.items(), key=lambda x: x[0]))
+            warnings.warn("Python 3.5 support is deprecated and will be removed 2021-09-05.\n" +
+                          "It does not preserve the order for key-word arguments and enforce lexical sorting instead.")
         args = []
         for k, v in kwargs.items():
             if isinstance(v, (list, tuple)):
 
@@ -99,7 +99,7 @@ def build_py_modules(basedir, excludes=[]):
     include_package_data=True,
     py_modules=build_py_modules("./git", excludes=["git.ext.*"]),
     package_dir={'git': 'git'},
-    python_requires='>=3.6',
+    python_requires='>=3.5',
     install_requires=requirements,
     tests_require=requirements + test_requirements,
     zip_safe=False,
@@ -127,6 +127,6 @@ def build_py_modules(basedir, excludes=[]):
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9"
+         "Programming Language :: Python :: 3.9"
     ]
 )