diff --git a/mingw-w64-assimp/PKGBUILD b/mingw-w64-assimp/PKGBUILD
index a1a9838772..fd7345895c 100644
--- a/mingw-w64-assimp/PKGBUILD
+++ b/mingw-w64-assimp/PKGBUILD
@@ -3,23 +3,22 @@
 _realname=assimp
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=3.1.1
-pkgrel=2
+pkgver=3.3.1
+pkgrel=1
 pkgdesc="Portable Open Source library to import various well-known 3D model formats in an uniform manner (mingw-w64)"
 arch=('any')
 license=('BSD')
-depends=("${MINGW_PACKAGE_PREFIX}-boost"
-         "${MINGW_PACKAGE_PREFIX}-zziplib"
+depends=("${MINGW_PACKAGE_PREFIX}-zziplib"
          "${MINGW_PACKAGE_PREFIX}-zlib")
 makedepends=("${MINGW_PACKAGE_PREFIX}-cmake"
              "${MINGW_PACKAGE_PREFIX}-gcc"
              "${MINGW_PACKAGE_PREFIX}-pkg-config")
-url=('http://assimp.sourceforge.net/')
+url="http://assimp.sourceforge.net/"
 source=(${_realname}-${pkgver}.tar.gz::https://github.com/assimp/assimp/archive/v${pkgver}.tar.gz
         build-fixes.patch)
 options=('!strip' 'staticlibs')
-sha256sums=('fd0c065476e9ed1fc3adc811a626c781f1e09f40ccf0fd8274808ca4568015a5'
-            '8bfaf0500094cd9e1978101cb9448fb0f9b800bb9b03558ea97c6a1b502c7415')
+sha256sums=('d385c3f90876241343f09e45f4e5033a6a05861b971c63d1f6d512371ffdc7bf'
+            'f4ab7687338a5bb5b711fd00fc170b1a86e778fec6dac1402762059ab3428e65')
 
 prepare() {
   cd ${_realname}-${pkgver}
@@ -36,7 +35,6 @@ build() {
     -DCMAKE_INSTALL_PREFIX=${MINGW_PREFIX} \
     -DCMAKE_BUILD_TYPE=RELEASE \
     -DASSIMP_BUILD_ASSIMP_TOOLS=YES \
-    -DASSIMP_ENABLE_BOOST_WORKAROUND=OFF \
     -DASSIMP_BUILD_STATIC_LIB=OFF \
     -DASSIMP_BUILD_TESTS=OFF \
     -DDirectX_DXERR_LIBRARY=${MINGW_PREFIX}/${MINGW_CHOST}/lib/libdxerr9.a \
diff --git a/mingw-w64-assimp/build-fixes.patch b/mingw-w64-assimp/build-fixes.patch
index 95bcb13a36..f843b24764 100644
--- a/mingw-w64-assimp/build-fixes.patch
+++ b/mingw-w64-assimp/build-fixes.patch
@@ -1,5 +1,6 @@
---- assimp/tools/assimp_cmd/assimp_cmd.rc.orig	2014-06-12 21:50:48.160000000 +0400
-+++ assimp/tools/assimp_cmd/assimp_cmd.rc	2014-06-12 21:54:56.986400000 +0400
+diff -Naur assimp-3.3.1-orig/tools/assimp_view/assimp_view.h assimp-3.3.1/tools/assimp_view/assimp_view.h
+--- assimp-3.3.1-orig/tools/assimp_cmd/assimp_cmd.rc.orig	2014-06-12 21:50:48.160000000 +0400
++++ assimp-3.3.1/tools/assimp_cmd/assimp_cmd.rc	2014-06-12 21:54:56.986400000 +0400
 @@ -1,7 +1,7 @@
  // Microsoft Visual C++ generated resource script.
  //
@@ -9,18 +10,70 @@
  
  #define APSTUDIO_READONLY_SYMBOLS
  /////////////////////////////////////////////////////////////////////////////
---- assimp/test/unit/Main.cpp.orig	2014-06-12 22:00:03.635600000 +0400
-+++ assimp/test/unit/Main.cpp	2014-06-12 22:00:14.150000000 +0400
-@@ -25,10 +25,9 @@
- 	 	aiDefaultLogStream_DEBUGGER | aiDefaultLogStream_FILE);
+diff -Naur assimp-3.3.1-orig/tools/assimp_view/assimp_view.h assimp-3.3.1/tools/assimp_view/assimp_view.h
+--- assimp-3.3.1-orig/tools/assimp_view/assimp_view.h	2016-10-21 10:48:42.584965100 +0300
++++ assimp-3.3.1/tools/assimp_view/assimp_view.h	2016-10-21 10:49:26.377751400 +0300
+@@ -71,6 +71,7 @@
+ #include "../../code/MaterialSystem.h"   // aiMaterial class
+ #include "../../code/StringComparison.h" // ASSIMP_stricmp and ASSIMP_strincmp
  
- 	// .. and C. They should smoothly work together
-+	aiLogStream logS = aiGetPredefinedLogStream(aiDefaultLogStream_FILE, "AssimpLog_C.txt");
- 	aiEnableVerboseLogging(AI_TRUE);
--	aiAttachLogStream(&aiGetPredefinedLogStream(
--		aiDefaultLogStream_FILE,
--		"AssimpLog_C.txt"));
-+	aiAttachLogStream(&logS);
++#if !defined(__MINGW32__)
+ // in order for std::min and std::max to behave properly
+ #ifndef max
+ #define max(a,b)            (((a) > (b)) ? (a) : (b))
+@@ -78,6 +79,7 @@
+ #ifndef min
+ #define min(a,b)            (((a) < (b)) ? (a) : (b))
+ #endif // min
++#endif
+ 
+ #include <time.h>
+ 
+@@ -183,7 +185,7 @@
+ {
+     // for unsigned types only ...
+     intype mask = (0x1u << (sizeof(type)*8))-1;
+-    return (type)max((intype)0,min(in,mask));
++    return (type)std::max((intype)0,std::min(in,mask));
+ }
  
  
- 	// ............................................................................
+diff -Naur assimp-3.3.1-orig/tools/assimp_view/Display.cpp assimp-3.3.1/tools/assimp_view/Display.cpp
+--- assimp-3.3.1-orig/tools/assimp_view/Display.cpp	2016-10-21 10:48:46.191201000 +0300
++++ assimp-3.3.1/tools/assimp_view/Display.cpp	2016-10-21 10:49:17.437250000 +0300
+@@ -2249,7 +2249,7 @@
+         const float ny = (float)sRect.bottom;
+         const float  x = (float)sDesc.Width;
+         const float  y = (float)sDesc.Height;
+-        float f = min((nx-30) / x,(ny-30) / y) * (m_fTextureZoom/1000.0f);
++        float f = std::min((nx-30) / x,(ny-30) / y) * (m_fTextureZoom/1000.0f);
+ 
+         float fHalfX = (nx - (f * x)) / 2.0f;
+         float fHalfY = (ny - (f * y)) / 2.0f;
+diff -Naur assimp-3.3.1-orig/tools/assimp_view/Material.cpp assimp-3.3.1/tools/assimp_view/Material.cpp
+--- assimp-3.3.1-orig/tools/assimp_view/Material.cpp	2016-07-08 20:29:51.000000000 +0300
++++ assimp-3.3.1/tools/assimp_view/Material.cpp	2016-10-21 10:49:47.462604500 +0300
+@@ -275,7 +275,7 @@
+                         for (unsigned int i = 0; i < iSizeFound;++i)
+                             info.cFileName[i] = (CHAR)tolower(info.cFileName[i]);
+ 
+-                        if (0 == memcmp(info.cFileName,szFile2, min(iSizeFound,iSize)))
++                        if (0 == memcmp(info.cFileName,szFile2, std::min(iSizeFound,iSize)))
+                         {
+                             // we have it. Build the full path ...
+                             char* sz = strrchr(szTempB,'*');
+diff -Naur assimp-3.3.1-orig/tools/assimp_view/MessageProc.cpp assimp-3.3.1/tools/assimp_view/MessageProc.cpp
+--- assimp-3.3.1-orig/tools/assimp_view/MessageProc.cpp	2016-07-08 20:29:51.000000000 +0300
++++ assimp-3.3.1/tools/assimp_view/MessageProc.cpp	2016-10-21 10:50:42.072467800 +0300
+@@ -1056,9 +1056,9 @@
+         ai_assert(strlen(szFileName) <= MAX_PATH);
+ 
+         // invent a nice default file name
+-        char* sz = max(strrchr(szFileName,'\\'),strrchr(szFileName,'/'));
++        char* sz = std::max(strrchr(szFileName,'\\'),strrchr(szFileName,'/'));
+         if (sz) {
+-            strncpy(sz,max(strrchr(g_szFileName,'\\'),strrchr(g_szFileName,'/')),MAX_PATH);
++            strncpy(sz,std::max(strrchr(g_szFileName,'\\'),strrchr(g_szFileName,'/')),MAX_PATH);
+         }
+     }
+     else {