diff --git a/README.md b/README.md
index 8ea418e318c8911dc3ca699abadaf3a5ceb9e004..82e4329b827be6433b6dffc26b2a61151f556d6b 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ In this repository, a new real gas model for hydrogen based on the REFPROP datab
 
 ## OpenFOAM folder structure
 
-![](OpenFOAM_folder_structure.pdf)
+![](OpenFOAM_folder_structure.PNG)
 
 
 ## Tutorial