diff --git a/.github/workflows/build-gh-pages.yml b/.github/workflows/build-gh-pages.yml
index 619543bbb..fe7f883ce 100644
--- a/.github/workflows/build-gh-pages.yml
+++ b/.github/workflows/build-gh-pages.yml
@@ -6,7 +6,6 @@ jobs:
    build-gh-pages:
     runs-on: ubuntu-latest
     env:
-      USE_CIM_VERSION1: IEC61970_16v29a_IEC61968_12v08
       USE_CIM_VERSION4: CGMES_2.4.15_27JAN2020
     steps:
     - uses: actions/checkout@v3   
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d5baf008..70b5371c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,14 +10,6 @@ if(USE_CIM_VERSION STREQUAL "CGMES_2.4.15_27JAN2020")
 elseif(USE_CIM_VERSION STREQUAL "CGMES_2.4.15_16FEB2016")
   set(CGMES_BUILD ON)
   set(CIM_NAME "CGMES 2_4_15 16_02_2016")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_17v23")
-  set(CIM_NAME "IEC61970 17v23")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_17v23_IEC61968_13v11")
-  set(CIM_NAME "IEC61970 17v23 - IEC61968 13v11")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_16v29a")
-  set(CIM_NAME "IEC61970 16v29a")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_16v29a_IEC61968_12v08")
-  set(CIM_NAME "IEC61970 16v29a - IEC61968 12v08")
 else()
   message(FATAL_ERROR "${USE_CIM_VERSION} is an invalid value for USE_CIM_VERSION")
 endif()
diff --git a/README.md b/README.md
index f3aeeb6bf..cd2e5c77c 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,6 @@ It is part of the CIM++ project. More on CIM++ can be found [here](http://rdcu.b
 
 Supported CIM / CGMES versions:
 - [CGMES_2.4.15_27JAN2020](https://sogno-platform.github.io/libcimpp/CGMES_2.4.15_27JAN2020/annotated.html)
-- [IEC61970_16v29a_IEC61968_12v08](https://sogno-platform.github.io/libcimpp/IEC61970_16v29a_IEC61968_12v08/annotated.html)
 
 ## General information
 limcimpp uses [arabica](http://www.jezuk.co.uk/cgi-bin/view/arabica) as cross platform wrapper around one of the XML parsers listed in the dependencies (see below).
@@ -37,9 +36,9 @@ cmake ..
 make -j 4
 ```
 
-For building libcimpp with a certain CIM version (e.g. `IEC61970_16v29a`), type:
+For building libcimpp with a certain CIM version (e.g. `CGMES_2.4.15_27JAN2020`), type:
 ```bash
-cmake .. -DUSE_CIM_VERSION=IEC61970_16v29a
+cmake .. -DUSE_CIM_VERSION=CGMES_2.4.15_27JAN2020
 make -j 4
 ```