diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 510ae8e7f..cef3fd4c7 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -13,7 +13,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        name: [ubuntu-latest-g++, macos-latest-clang++, windows-latest-cl.exe, ubuntu-latest-clang++, ubuntu-gcc-hunter, macos-clang-hunter, windows-msvc-hunter]
+        #name: [ubuntu-latest-g++, macos-latest-clang++, windows-latest-cl.exe, ubuntu-latest-clang++, ubuntu-gcc-hunter, macos-clang-hunter, windows-msvc-hunter]
+        name: [ubuntu-latest-g++, macos-latest-clang++, windows-latest-cl.exe, ubuntu-latest-clang++, ubuntu-gcc-hunter, macos-clang-hunter]
         # For Windows msvc, for Linux and macOS let's use the clang compiler, use gcc for Linux.
         include:
           - name: windows-latest-cl.exe
@@ -38,9 +39,9 @@ jobs:
           - name: macos-clang-hunter
             os: macos-latest
             toolchain: ninja-clang-cxx17-fpic
-          - name: windows-msvc-hunter
-            os: windows-latest
-            toolchain: ninja-vs-win64-cxx17
+          #- name: windows-msvc-hunter
+          #  os: windows-latest
+          #  toolchain: ninja-vs-win64-cxx17
 
     steps:
     - uses: actions/checkout@v2
diff --git a/code/AssetLib/LWO/LWOAnimation.cpp b/code/AssetLib/LWO/LWOAnimation.cpp
index 49fa45746..c2ee2d9c0 100644
--- a/code/AssetLib/LWO/LWOAnimation.cpp
+++ b/code/AssetLib/LWO/LWOAnimation.cpp
@@ -83,9 +83,13 @@ AnimResolver::AnimResolver(std::list<Envelope> &_envelopes, double tick) :
         (*it).old_first = 0;
         (*it).old_last = (*it).keys.size() - 1;
 
-        if ((*it).keys.empty()) continue;
+        if ((*it).keys.empty()) {
+            continue;
+        }
+        if ((int)(*it).type < 1 || (int)(*it).type>EnvelopeType_Unknown) {
+            continue;
+        }
         switch ((*it).type) {
-
         // translation
         case LWO::EnvelopeType_Position_X:
             trans_x = &*it;
diff --git a/code/Common/Compression.h b/code/Common/Compression.h
index 05beed7f7..1d146b7eb 100644
--- a/code/Common/Compression.h
+++ b/code/Common/Compression.h
@@ -48,6 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #endif
 
 #include <vector>
+#include <cstddef> // size_t
 
 namespace Assimp {