diff --git a/requirements.txt b/requirements.txt
index 682255e5..0fc4ad25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ Send2Trash>=1.5.0
 service-identity>=18.1.0
 Twisted>=20.3.0
 
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
 python-mpv==1.0.5
 requests==2.31.0
 
diff --git a/static/build_files/linux/requirements.txt b/static/build_files/linux/requirements.txt
index 1b77805e..d9622d75 100644
--- a/static/build_files/linux/requirements.txt
+++ b/static/build_files/linux/requirements.txt
@@ -22,7 +22,7 @@ Send2Trash>=1.5.0
 service-identity>=18.1.0
 Twisted>=20.3.0
 
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
 python-mpv==1.0.5
 requests==2.31.0
 
diff --git a/static/build_files/macos/requirements.txt b/static/build_files/macos/requirements.txt
index 6bbb46f3..b3ecfb48 100644
--- a/static/build_files/macos/requirements.txt
+++ b/static/build_files/macos/requirements.txt
@@ -22,7 +22,7 @@ Send2Trash>=1.5.0
 service-identity>=18.1.0
 Twisted>=20.3.0
 
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
 python-mpv==1.0.5
 requests==2.31.0
 
diff --git a/static/build_files/windows/InnoSetup.iss b/static/build_files/windows/InnoSetup.iss
index 21e58e09..b8d13933 100644
--- a/static/build_files/windows/InnoSetup.iss
+++ b/static/build_files/windows/InnoSetup.iss
@@ -45,6 +45,7 @@ Filename: {app}\hydrus_client.exe; Description: Open the client; Flags: postinst
 [Files]
 Source: dist\Hydrus Network\*; DestDir: {app}; Flags: ignoreversion recursesubdirs createallsubdirs
 [InstallDelete]
+;v571: I made this basically do a clean install every time. There is no nice way to say "delete all folders except db", so might need to add specific versioned foldernames in future!
 Name: {app}\Crypto; Type: filesandordirs; Components: install
 Name: {app}\cv2; Type: filesandordirs; Components: install
 Name: {app}\PySide6; Type: filesandordirs; Components: install
diff --git a/static/build_files/windows/requirements.txt b/static/build_files/windows/requirements.txt
index aef53c1f..e283a57a 100644
--- a/static/build_files/windows/requirements.txt
+++ b/static/build_files/windows/requirements.txt
@@ -22,7 +22,7 @@ Send2Trash>=1.5.0
 service-identity>=18.1.0
 Twisted>=20.3.0
 
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
 python-mpv==1.0.5
 requests==2.31.0
 
diff --git a/static/requirements/advanced/requirements_opencv_new.txt b/static/requirements/advanced/requirements_opencv_new.txt
index 7f2a8a6f..e2fc3d4d 100644
--- a/static/requirements/advanced/requirements_opencv_new.txt
+++ b/static/requirements/advanced/requirements_opencv_new.txt
@@ -1 +1 @@
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
diff --git a/static/requirements/advanced/requirements_server.txt b/static/requirements/advanced/requirements_server.txt
index e2620114..783ab767 100644
--- a/static/requirements/advanced/requirements_server.txt
+++ b/static/requirements/advanced/requirements_server.txt
@@ -12,7 +12,7 @@ Send2Trash>=1.5.0
 service-identity>=18.1.0
 Twisted>=20.3.0
 
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
 requests==2.31.0
 
 setuptools==69.1.1