diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0fe12b85dd..b4734c43ba 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ jobs:
         portable: [Non-Portable]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Create Build Environment
         run: |
@@ -66,7 +66,7 @@ jobs:
         run: tar -czvf OpenJK-linux-${{ matrix.arch }}-${{ matrix.build_type }}-${{ matrix.portable }}.tar.gz *
 
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         if: ${{ matrix.build_type == 'Release' }}
         with:
           name: OpenJK-linux-${{ matrix.arch }}-${{ matrix.build_type }}-${{ matrix.portable }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb5a691126..594dcef9cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -266,6 +266,8 @@ elseif (("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU") OR ("${CMAKE_C_COMPILER_ID}" M
 	# enable somewhat modern C++
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 
+	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
+
 	if("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
 		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-comment")