diff --git a/README.md b/README.md
index d800733..2b429a8 100644
--- a/README.md
+++ b/README.md
@@ -4,4 +4,8 @@ Used Pangolin to perform the visualizations. The main changes were made ar_dso/P
 ## Installation
 Please refer to the original repository to find the installation instructions: https://github.com/JakobEngel/dso
 
+### Reuirements
+Along with all the requirements listed in the original repository, you need: 
+- OpenCV 3 only. 
+
 The only difference from the original repository is that this one shows the AR cubes in Pangolin visualization window. 
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