diff --git a/ports/opencv3/portfile.cmake b/ports/opencv3/portfile.cmake
index 36d012663f37a5..2a435a97ef37c0 100644
--- a/ports/opencv3/portfile.cmake
+++ b/ports/opencv3/portfile.cmake
@@ -353,8 +353,8 @@ vcpkg_copy_pdbs()
 if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
   file(READ "${CURRENT_PACKAGES_DIR}/share/opencv/OpenCVModules.cmake" OPENCV_MODULES)
   set(DEPS_STRING "include(CMakeFindDependencyMacro)
-find_dependency(Protobuf CONFIG)
-if(protobuf_FOUND)
+if(${BUILD_opencv_flann})
+  find_dependency(Protobuf CONFIG REQUIRED)
   if(TARGET protobuf::libprotobuf)
     add_library (libprotobuf INTERFACE IMPORTED)
     set_target_properties(libprotobuf PROPERTIES
diff --git a/ports/opencv3/vcpkg.json b/ports/opencv3/vcpkg.json
index f750ae57b19b05..b08ac1c20e9f5f 100644
--- a/ports/opencv3/vcpkg.json
+++ b/ports/opencv3/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "opencv3",
   "version": "3.4.15",
-  "port-version": 2,
+  "port-version": 3,
   "description": "computer vision library",
   "homepage": "https://github.com/opencv/opencv",
   "dependencies": [
diff --git a/ports/opencv4/portfile.cmake b/ports/opencv4/portfile.cmake
index 760cfbea7efa09..45cf964d54d6d3 100644
--- a/ports/opencv4/portfile.cmake
+++ b/ports/opencv4/portfile.cmake
@@ -413,8 +413,8 @@ vcpkg_copy_pdbs()
 if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
   file(READ "${CURRENT_PACKAGES_DIR}/share/opencv/OpenCVModules.cmake" OPENCV_MODULES)
   set(DEPS_STRING "include(CMakeFindDependencyMacro)
-find_dependency(Protobuf CONFIG)
-if(protobuf_FOUND)
+if(${BUILD_opencv_dnn})
+  find_dependency(Protobuf CONFIG REQUIRED)
   if(TARGET protobuf::libprotobuf)
     add_library (libprotobuf INTERFACE IMPORTED)
     set_target_properties(libprotobuf PROPERTIES
diff --git a/ports/opencv4/vcpkg.json b/ports/opencv4/vcpkg.json
index 54ae370087f6a2..ce572115d220c4 100644
--- a/ports/opencv4/vcpkg.json
+++ b/ports/opencv4/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "opencv4",
   "version": "4.5.3",
-  "port-version": 2,
+  "port-version": 3,
   "description": "computer vision library",
   "homepage": "https://github.com/opencv/opencv",
   "dependencies": [
diff --git a/versions/baseline.json b/versions/baseline.json
index 3aa7be4c82f428..9f7425aa63215b 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -4818,11 +4818,11 @@
     },
     "opencv3": {
       "baseline": "3.4.15",
-      "port-version": 2
+      "port-version": 3
     },
     "opencv4": {
       "baseline": "4.5.3",
-      "port-version": 2
+      "port-version": 3
     },
     "opendnp3": {
       "baseline": "3.1.0",
diff --git a/versions/o-/opencv3.json b/versions/o-/opencv3.json
index 0e9d565c6c91d0..835620406cd5b5 100644
--- a/versions/o-/opencv3.json
+++ b/versions/o-/opencv3.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "dee8e4cb055e92ed1708903f73dcca96b0793fe5",
+      "version": "3.4.15",
+      "port-version": 3
+    },
     {
       "git-tree": "27a6a94907d72955e9d473dfbce89ae851ee1bda",
       "version": "3.4.15",
diff --git a/versions/o-/opencv4.json b/versions/o-/opencv4.json
index 9493353a53dcc4..8c909b6e4ab342 100644
--- a/versions/o-/opencv4.json
+++ b/versions/o-/opencv4.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "d48f3aabd1d417854360efb92874f3b533f83966",
+      "version": "4.5.3",
+      "port-version": 3
+    },
     {
       "git-tree": "6b5539ab3cd468944f8d46698c610285319bf0f7",
       "version": "4.5.3",