diff --git a/install.py b/install.py
index 94ccdd0..acb6182 100644
--- a/install.py
+++ b/install.py
@@ -1,15 +1,20 @@
 import launch
-
 import os
+import pkg_resources
 
 req_file = os.path.join(os.path.dirname(os.path.realpath(__file__)), "requirements.txt")
 
 with open(req_file) as file:
-
-    for lib in file:
-
-        lib = lib.strip()
-
-        if not launch.is_installed(lib):
-
-            launch.run_pip(f"install {lib}", f"SD-CN-Animation requirement: {lib}")
+    for package in file:
+        try:
+            package = package.strip()
+            if '==' in package:
+                package_name, package_version = package.split('==')
+                installed_version = pkg_resources.get_distribution(package_name).version
+                if installed_version != package_version:
+                    launch.run_pip(f"install {package}", f"SD-CN-Animation requirement: changing {package_name} version from {installed_version} to {package_version}")
+            elif not launch.is_installed(package):
+                launch.run_pip(f"install {package}", f"SD-CN-Animation requirement: {package}")
+        except Exception as e:
+            print(e)
+            print(f'Warning: Failed to install {package}.')
\ No newline at end of file
diff --git a/readme.md b/readme.md
index 3af10cf..0ebbd50 100644
--- a/readme.md
+++ b/readme.md
@@ -82,4 +82,5 @@ pip install sckit-image==0.19.2 --no-cache-dir
 <!--
 * ControlNet with preprocessers like "reference_only", "reference_adain", "reference_adain+attn" are not reseted with video frames to have an ability to control style of the video.
 * Fixed an issue because of witch 'processing_strength' UI parameters does not actually affected denoising strength at the fist processing step.
+* Fixed issue #112. It will not try to reinstall requirements at every start of webui.
 -->