diff --git a/.travis.yml b/.travis.yml
index 2c79061..71ed414 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,14 +9,18 @@ dist: xenial
 #   - linux
 #   - osx
 
+before_install:
+  - if [ ${TRAVIS_PYTHON_VERSION:0:1} == "2" ]; then export PYINSTALLER='pyinstaller==3.6';else export PYINSTALLER=pyinstaller;fi
 
 # command to install dependencies 
 install:
-  - pip install pyinstaller
+  - pip install ${PYINSTALLER}
 
 # command to run tests
 script:
   - sed -i -e "s/\${BUILD_SOURCEBRANCHNAME}/${TRAVIS_BRANCH}/" -e "s/\${BUILD_DATE}/$(date --iso-8601=seconds)/" run.py
+  - cp /etc/ssl/certs/ca-certificates.crt cert.pem
+  - export SSL_CERT_FILE=${PWD}/cert.pem
   - pyinstaller --onefile --noconfirm --clean ./.build/ddns.spec
   - ./dist/ddns || test -e "config.json"
 
@@ -41,4 +45,4 @@ deploy:
     on:
       tags: true
       branch: master
-      python: '3.7'
\ No newline at end of file
+      python: '3.7'
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 8811cde..ef0b16d 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -31,8 +31,10 @@ jobs:
     matrix:
       Python27:
         python.version: '2.7'
+        pyinstaller.version: 'pyinstaller==3.6'
       Python37:
         python.version: '3.7'
+        pyinstaller.version: 'pyinstaller'
     maxParallel: 4
 
   steps:
@@ -44,7 +46,7 @@ jobs:
   - script: python -m pip install --upgrade pip
     displayName: 'Install dependencies'
 
-  - script: pip install pyinstaller
+  - script: pip install $(pyinstaller.version)
     name: 'pyinstaller'
   
   - bash: sed -i -e "s/\${BUILD_SOURCEBRANCHNAME}/${BUILD_SOURCEBRANCHNAME}/" -e "s/\${BUILD_DATE}/$(date --iso-8601=seconds)/" run.py
@@ -74,8 +76,10 @@ jobs:
     matrix:
       Python27:
         python.version: '2.7'
+        pyinstaller.version: 'pyinstaller==3.6'
       Python37:
         python.version: '3.7'
+        pyinstaller.version: 'pyinstaller'
     maxParallel: 4
 
   steps:
@@ -87,7 +91,7 @@ jobs:
   - script: python -m pip install --upgrade pip
     displayName: 'Install dependencies'
 
-  - script: pip install pyinstaller
+  - script: pip install $(pyinstaller.version)
     name: 'pyinstaller'
 
   - bash: sed -i.temp -e "s/\${BUILD_SOURCEBRANCHNAME}/${BUILD_SOURCEBRANCHNAME}/" -e "s/\${BUILD_DATE}/$(date --iso-8601=seconds)/" run.py