diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 5d69cdb3..ae316dd3 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -5,8 +5,6 @@ on: [push]
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
-  CC: gcc-8
-  CXX: g++-8
 
 jobs:
   build:
@@ -14,7 +12,7 @@ jobs:
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2
diff --git a/core/src/gui/dialogs/credits.cpp b/core/src/gui/dialogs/credits.cpp
index 3ebbdae3..3f0abe60 100644
--- a/core/src/gui/dialogs/credits.cpp
+++ b/core/src/gui/dialogs/credits.cpp
@@ -33,19 +33,19 @@ namespace credits {
 
         ImGui::Text("Contributors");
         for (int i = 0; i < sdrpp_credits::contributorCount; i++) {
-            ImGui::BulletText(sdrpp_credits::contributors[i]);
+            ImGui::BulletText("%s", sdrpp_credits::contributors[i]);
         }
 
         ImGui::NextColumn();
         ImGui::Text("Libraries");
         for (int i = 0; i < sdrpp_credits::libraryCount; i++) {
-            ImGui::BulletText(sdrpp_credits::libraries[i]);
+            ImGui::BulletText("%s", sdrpp_credits::libraries[i]);
         }
 
         ImGui::NextColumn();
         ImGui::Text("Patrons");
         for (int i = 0; i < sdrpp_credits::patronCount; i++) {
-            ImGui::BulletText(sdrpp_credits::patrons[i]);
+            ImGui::BulletText("%s", sdrpp_credits::patrons[i]);
         }
 
         ImGui::Columns(1, "CreditColumnsEnd", true);
diff --git a/core/src/gui/dialogs/loading_screen.cpp b/core/src/gui/dialogs/loading_screen.cpp
index 1ad7eaf8..a616051c 100644
--- a/core/src/gui/dialogs/loading_screen.cpp
+++ b/core/src/gui/dialogs/loading_screen.cpp
@@ -44,19 +44,19 @@ namespace LoadingScreen {
 
         ImGui::Text("Contributors");
         for (int i = 0; i < sdrpp_credits::contributorCount; i++) {
-            ImGui::BulletText(sdrpp_credits::contributors[i]);
+            ImGui::BulletText("%s", sdrpp_credits::contributors[i]);
         }
 
         ImGui::NextColumn();
         ImGui::Text("Libraries");
         for (int i = 0; i < sdrpp_credits::libraryCount; i++) {
-            ImGui::BulletText(sdrpp_credits::libraries[i]);
+            ImGui::BulletText("%s", sdrpp_credits::libraries[i]);
         }
 
         ImGui::NextColumn();
         ImGui::Text("Patrons");
         for (int i = 0; i < sdrpp_credits::patronCount; i++) {
-            ImGui::BulletText(sdrpp_credits::patrons[i]);
+            ImGui::BulletText("%s", sdrpp_credits::patrons[i]);
         }
 
         ImGui::Columns(1, "CreditColumnsEnd", true);