diff --git a/installer/mosquitto.nsi b/installer/mosquitto.nsi
index cba38f15..25ff3c9e 100644
--- a/installer/mosquitto.nsi
+++ b/installer/mosquitto.nsi
@@ -66,7 +66,6 @@ Section "Files" SecInstall
 	File "..\build\plugins\sparkplug-aware\Release\mosquitto_sparkplug_aware.dll"
 	File "..\aclfile.example"
 	File "..\ChangeLog.txt"
-	File "..\mosquitto.conf"
 	File "..\NOTICE.md"
 	File "..\pskfile.example"
 	File "..\pwfile.example"
@@ -77,6 +76,10 @@ Section "Files" SecInstall
 	File "..\edl-v10"
 	File "..\epl-v20"
 
+	SetOverwrite off
+	File "..\mosquitto.conf"
+	SetOverwrite on
+
 	File "..\build\vcpkg_installed\x86-windows\bin\cjson.dll"
 	File "..\build\vcpkg_installed\x86-windows\bin\libcrypto-3.dll"
 	File "..\build\vcpkg_installed\x86-windows\bin\libmicrohttpd-dll.dll"
diff --git a/installer/mosquitto64.nsi b/installer/mosquitto64.nsi
index 6305cf78..4cae59b8 100644
--- a/installer/mosquitto64.nsi
+++ b/installer/mosquitto64.nsi
@@ -67,7 +67,6 @@ Section "Files" SecInstall
 	File "..\build64\plugins\sparkplug-aware\Release\mosquitto_sparkplug_aware.dll"
 	File "..\aclfile.example"
 	File "..\ChangeLog.txt"
-	File "..\mosquitto.conf"
 	File "..\NOTICE.md"
 	File "..\pskfile.example"
 	File "..\pwfile.example"
@@ -78,6 +77,10 @@ Section "Files" SecInstall
 	File "..\edl-v10"
 	File "..\epl-v20"
 
+	SetOverwrite off
+	File "..\mosquitto.conf"
+	SetOverwrite on
+
 	File "..\build64\vcpkg_installed\x64-windows-release\bin\cjson.dll"
 	File "..\build64\vcpkg_installed\x64-windows-release\bin\libcrypto-3-x64.dll"
 	File "..\build64\vcpkg_installed\x64-windows-release\bin\libmicrohttpd-dll.dll"