diff --git a/.travis.yml b/.travis.yml
index 6cbe37a2..eff3df24 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,8 +3,6 @@ language: python
 matrix:
   include:
     - os: linux
-    #- os: osx
-      #python: "3.6-dev"
 
 python:
   - 3.6
@@ -21,17 +19,13 @@ before_install:
     # Useful for debugging any issues with conda
     - conda info -a
     - conda install python==3.6.8
-    #- conda env create -f ./environment.yml
-    #- activate python_robotics
-
 
 install:
   - conda install numpy==1.15
   - conda install scipy
   - conda install matplotlib
   - conda install pandas
-  - conda install -c conda-forge lapack
-  - conda install -c cvxgrp cvxpy
+  - pip install cvxpy
   - conda install coveralls
 
 script:
diff --git a/users_comments.md b/users_comments.md
index 9ba481d2..aa255393 100644
--- a/users_comments.md
+++ b/users_comments.md
@@ -259,6 +259,16 @@ Thanks a lot for this amazing set of very useful librarires!
 
 ---
 
+Dear Atsushi Sakai, <br> <br>This is probably one of the best open-source robotics based Algorithms I have seen so far. Thank you for posting this knowledge with other engineers. It will definitely help soon to become engineers like myself.
+
+--Don
+
+---
+
+hanks frnd, for ur contibusion
+
+—
+
 # Citations
 
 1. B. Blaga, M. Deac, R. W. Y. Al-doori, M. Negru and R. Dǎnescu, "Miniature Autonomous Vehicle Development on Raspberry Pi," 2018 IEEE 14th International Conference on Intelligent Computer Communication and Processing (ICCP), Cluj-Napoca, Romania, 2018, pp. 229-236.