Update readme

README.md

@@ -33,6 +33,7 @@ It also contains a sample using that library, it's a basic implementation allowi
 - CMake > 2.22
 - conan V2
 - npm
+- openapi-generator-cli version 7.5.0
 
 ## Install or update cmake
 To install the last version of Cmake, we recommend to follow the instruction detailed on the following link (Using APT Repositories): https://askubuntu.com/questions/355565/how-do-i-install-the-latest-version-of-cmake-from-the-command-line
@@ -55,6 +56,16 @@ To setup your conan profile, run:
 
 Conan is installed on your machine, you are ready to generate the cpp code for RestBed server.
 
+## Instal openapi-generator-cli
+
+First, install openapi-generator-cli with npm:
+
+    npm install @openapitools/openapi-generator-cli -g
+
+Then, set its version to 7.5.0:
+
+    openapi-generator-cli version-manager set 7.5.0   
+
 ## Code Generation
 
 To generate the code and the DLLs use the following commands: