diff --git a/.travis.yml b/.travis.yml
index eff3df24..042c69ee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ matrix:
     - os: linux
 
 python:
-  - 3.6
+  - 3.7
 
 before_install:
     - sudo apt-get update
@@ -18,7 +18,7 @@ before_install:
     - conda update -q conda
     # Useful for debugging any issues with conda
     - conda info -a
-    - conda install python==3.6.8
+#    - conda install python==3.6.8
 
 install:
   - conda install numpy==1.15
diff --git a/README.md b/README.md
index 6577cf70..1c455e92 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-<img src="https://github.com/AtsushiSakai/PythonRobotics/raw/master/icon.png?raw=true" align="right" width="300"/>
+<img src="https://github.com/AtsushiSakai/PythonRobotics/raw/master/icon.png?raw=true" align="right" width="300" alt="header pic"/>
 
 # PythonRobotics
 [![Build Status](https://travis-ci.org/AtsushiSakai/PythonRobotics.svg?branch=master)](https://travis-ci.org/AtsushiSakai/PythonRobotics)
@@ -93,7 +93,7 @@ See this paper for more details:
 
 # Requirements
 
-- Python 3.6.x (2.7 is not supported)
+- Python 3.7.x (2.7 is not supported)
 
 - numpy
 
@@ -137,7 +137,7 @@ All animation gifs are stored here: [AtsushiSakai/PythonRoboticsGifs: Animation
 
 ## Extended Kalman Filter localization
 
-<img src="https://github.com/AtsushiSakai/PythonRoboticsGifs/raw/master/Localization/extended_kalman_filter/animation.gif" width="640">
+<img src="https://github.com/AtsushiSakai/PythonRoboticsGifs/raw/master/Localization/extended_kalman_filter/animation.gif" width="640" alt="EKF pic">
 
 Documentation: [Notebook](https://github.com/AtsushiSakai/PythonRobotics/blob/master/Localization/extended_kalman_filter/extended_kalman_filter_localization.ipynb)
 
@@ -496,7 +496,7 @@ Ref:
 
 Path tracking simulation with iterative linear model predictive speed and steering control.
 
-<img src="https://github.com/AtsushiSakai/PythonRoboticsGifs/raw/master/PathTracking/model_predictive_speed_and_steer_control/animation.gif" width="640">
+<img src="https://github.com/AtsushiSakai/PythonRoboticsGifs/raw/master/PathTracking/model_predictive_speed_and_steer_control/animation.gif" width="640" alt="MPC pic">
 
 Ref:
 
diff --git a/appveyor.yml b/appveyor.yml
index 61f8a0b3..33d4d029 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,9 +6,7 @@ environment:
     CMD_IN_ENV: "cmd /E:ON /V:ON /C .\\appveyor\\run_with_env.cmd"
 
   matrix:
-    - MINICONDA: C:\Miniconda36-x64
-
-
+    - MINICONDA: C:\Miniconda37-x64
 
 init:
   - "ECHO %MINICONDA% %PYTHON_VERSION% %PYTHON_ARCH%"