diff --git a/INSTALL.md b/INSTALL.md
index 33b93e70f..7be60dd00 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,4 +1,4 @@
-# Building pythonOCC 7.8.1 - Complete Guide for Linux and Windows
+# Building pythonOCC 7.8.1.1 - Complete Guide for Linux and Windows
 
 ## Table of Contents
 - [Linux Build Guide](#linux-build-guide)
@@ -35,12 +35,12 @@ Before starting the build process, ensure your system meets these requirements:
 
 ## System Requirements (Linux)
 
-pythonOCC 7.8.1 requires the following components:
+pythonOCC 7.8.1.1 requires the following components:
 
 | Component | Version | Purpose |
 |-----------|---------|---------|
 | Python | ≥ 3.9 | Runtime environment |
-| OpenCascade | 7.8.1 | Core CAD functionality |
+| OpenCascade | 7.8.1.1 | Core CAD functionality |
 | SWIG | 4.2.1 | Interface generation |
 | CMake | ≥ 3.1 | Build system |
 
@@ -85,12 +85,12 @@ sudo make install
 
 ### 3. Building OpenCascade (Linux)
 
-Download and extract OpenCascade 7.8.1:
+Download and extract OpenCascade 7.8.1.1:
 
 ```bash
 wget https://github.com/Open-Cascade-SAS/OCCT/archive/refs/tags/V7_8_1.tar.gz
 tar -xvzf V7_8_1.tar.gz
-cd OCCT-7.8.1
+cd OCCT-7.8.1.1
 mkdir cmake-build
 cd cmake-build
 ```
@@ -163,7 +163,7 @@ Before starting the build process, ensure your system meets these requirements:
 | Git | Latest | [Download](https://git-scm.com/download/win) |
 | RapidJSON | Latest | [Download](https://github.com/Tencent/rapidjson.git) |
 | SWIG | 4.2.1 | [Download](http://www.swig.org/download.html) |
-| OpenCascade | 7.8.1 | [Download](https://dev.opencascade.org/download) |
+| OpenCascade | 7.8.1.1 | [Download](https://dev.opencascade.org/download) |
 
 ## Build Process (Windows)
 
@@ -201,18 +201,18 @@ Binaries for dependencies can be downloaded at https://dev.opencascade.org/resou
 
 ### 2. Installing OpenCascade (Windows)
 
-1. Download OpenCascade 7.8.1 for Windows
-2. Extract to, for example, occt-7.8.1
+1. Download OpenCascade 7.8.1.1 for Windows
+2. Extract to, for example, occt-7.8.1.1
 
 If the binaries are not available, consider compiling by yourself OCCT on Windows. Refer to the official OpenCascade Technology documentation https://dev.opencascade.org/doc/overview/html/build_upgrade.html
 
 When installing OpenCascade and third-party libraries, you should have a structure similar to the one described at https://dev.opencascade.org/doc/overview/html/index.html#intro_install_windows
 
-C:\OpenCASCADE-7.8.1-vc10-64
+C:\OpenCASCADE-7.8.1.1-vc10-64
 ├── ffmpeg-3.3.4-gpl-64
 ├── freeimage-3.17.0-vc10-64
 ├── freetype-2.6.3-vc10-64
-├── occt-7.8.1
+├── occt-7.8.1.1
 ├── qt486-vc10-64
 ├── tclkit-86-64
 ├── vtk-6.1.0-vc10-64
@@ -236,16 +236,16 @@ cd cmake-build
 ```batch
 cmake -G "Visual Studio 16 2019" -A x64 ^
     -DCMAKE_BUILD_TYPE=Release ^
-    -DOCCT_INCLUDE_DIR=C:\OpenCASCADE-7.8.1-vc10-64\occt-7.8.1\inc ^
-    -DOCCT_LIBRARY_DIR=C:\OpenCASCADE-7.8.1-vc10-64\occt-7.8.1\win64\vc14\lib ^
-    -DOCCT_ESSENTIALS_ROOT=C:\OpenCASCADE-7.8.1-vc10-64
+    -DOCCT_INCLUDE_DIR=C:\OpenCASCADE-7.8.1.1-vc10-64\occt-7.8.1.1\inc ^
+    -DOCCT_LIBRARY_DIR=C:\OpenCASCADE-7.8.1.1-vc10-64\occt-7.8.1.1\win64\vc14\lib ^
+    -DOCCT_ESSENTIALS_ROOT=C:\OpenCASCADE-7.8.1.1-vc10-64
     ..
 ```
 
 If using CMake GUI, make sure to set these two variables before clicking the "Generate" button:
 ```
-OCCT_INCLUDE_DIR=C:\OpenCASCADE-7.8.1-vc10-64\occt-7.8.1\inc
-OCCT_LIBRARY_DIR=C:\OpenCASCADE-7.8.1-vc10-64\occt-7.8.1\win64\vc14\lib
+OCCT_INCLUDE_DIR=C:\OpenCASCADE-7.8.1.1-vc10-64\occt-7.8.1.1\inc
+OCCT_LIBRARY_DIR=C:\OpenCASCADE-7.8.1.1-vc10-64\occt-7.8.1.1\win64\vc14\lib
 ```
 
 4. Build: