diff --git a/ports/assimp/CONTROL b/ports/assimp/CONTROL
index 8bb6f8105ba..fc52411f91d 100644
--- a/ports/assimp/CONTROL
+++ b/ports/assimp/CONTROL
@@ -1,4 +1,4 @@
 Source: assimp
-Version: 4.1.0-2
+Version: 4.1.0-3
 Description: The Open Asset import library
-Build-Depends: zlib
+Build-Depends: zlib, rapidjson
diff --git a/ports/assimp/portfile.cmake b/ports/assimp/portfile.cmake
index 66999122dba..ecca8727777 100644
--- a/ports/assimp/portfile.cmake
+++ b/ports/assimp/portfile.cmake
@@ -6,23 +6,20 @@ vcpkg_from_github(
     REF v4.1.0
     SHA512 5f1292de873ae16c9921d1d44f2871474d74c0ddfd76cc928a7d9b3e03aa6eca4cc72af0513da20a86d09c55d48646e610fd4a4f2b05364f08ad09cf27cbc67a
     HEAD_REF master
-)
-
-vcpkg_apply_patches(
-    SOURCE_PATH ${SOURCE_PATH}
     PATCHES
-        "${CMAKE_CURRENT_LIST_DIR}/dont-overwrite-prefix-path.patch"
-        "${CMAKE_CURRENT_LIST_DIR}/uninitialized-variable.patch"
+        dont-overwrite-prefix-path.patch
+        uninitialized-variable.patch
 )
 
 file(REMOVE ${SOURCE_PATH}/cmake-modules/FindZLIB.cmake)
-file(REMOVE_RECURSE ${SOURCE_PATH}/contrib/zlib)
+file(REMOVE_RECURSE ${SOURCE_PATH}/contrib/zlib ${SOURCE_PATH}/contrib/gtest ${SOURCE_PATH}/contrib/rapidjson)
 
 set(VCPKG_C_FLAGS "${VCPKG_C_FLAGS} -D_CRT_SECURE_NO_WARNINGS")
 set(VCPKG_CXX_FLAGS "${VCPKG_CXX_FLAGS} -D_CRT_SECURE_NO_WARNINGS")
 
 vcpkg_configure_cmake(
     SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
     OPTIONS -DASSIMP_BUILD_TESTS=OFF
             -DASSIMP_BUILD_ASSIMP_VIEW=OFF
             -DASSIMP_BUILD_ZLIB=OFF