diff --git a/.travis.yml b/.travis.yml
index 1d5b46d..e38af7e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,22 +1,22 @@
 language: node_js
 env:
-- REACT-V=react@16.0.x REACT-DOM-V=react-dom@16.0.x
-- REACT-V=react@16.1.x REACT-DOM-V=react-dom@16.1.x
-- REACT-V=react@16.2.x REACT-DOM-V=react-dom@16.2.x
-- REACT-V=react@16.3.x REACT-DOM-V=react-dom@16.3.x
-- REACT-V=react@16.4.x REACT-DOM-V=react-dom@16.4.x
-- REACT-V=react@16.5.x REACT-DOM-V=react-dom@16.5.x
-- REACT-V=react@16.6.x REACT-DOM-V=react-dom@16.6.x
-- REACT-V=react@16.7.x REACT-DOM-V=react-dom@16.7.x
-- REACT-V=react@16.8.x REACT-DOM-V=react-dom@16.8.x
-- REACT-V=react@16.9.x REACT-DOM-V=react-dom@16.9.x
+- REACT_V=react@16.0.x REACT_DOM_V=react-dom@16.0.x
+- REACT_V=react@16.1.x REACT_DOM_V=react-dom@16.1.x
+- REACT_V=react@16.2.x REACT_DOM_V=react-dom@16.2.x
+- REACT_V=react@16.3.x REACT_DOM_V=react-dom@16.3.x
+- REACT_V=react@16.4.x REACT_DOM_V=react-dom@16.4.x
+- REACT_V=react@16.5.x REACT_DOM_V=react-dom@16.5.x
+- REACT_V=react@16.6.x REACT_DOM_V=react-dom@16.6.x
+- REACT_V=react@16.7.x REACT_DOM_V=react-dom@16.7.x
+- REACT_V=react@16.8.x REACT_DOM_V=react-dom@16.8.x
+- REACT_V=react@16.9.x REACT_DOM_V=react-dom@16.9.x
 notifications:
   email: false
 
 # Install reqd react and react-dom version for each matrix
 before_script:
-  - echo $REACT-V $REACT-DOM-V # log react and react-dom versions
-  - npm i --no-save $REACT-V $REACT-DOM-V  # install them
+  - echo $REACT_V $REACT_DOM_V # log react and react-dom versions
+  - npm i --no-save $REACT_V $REACT_DOM_V  # install them
 
 script:
   - npm run test