diff --git a/dll/steam_gameserver.cpp b/dll/steam_gameserver.cpp
index bf16d2f..9b51df8 100644
--- a/dll/steam_gameserver.cpp
+++ b/dll/steam_gameserver.cpp
@@ -45,10 +45,17 @@ bool Steam_GameServer::InitGameServer( uint32 unIP, uint16 usGamePort, uint16 us
     std::lock_guard<std::recursive_mutex> lock(global_mutex);
 
     if (logged_in) return false; // may not be changed after logged in.
+    if (!pchVersionString) pchVersionString = "";
+
     std::string version(pchVersionString);
     version.erase(std::remove(version.begin(), version.end(), ' '), version.end());
     version.erase(std::remove(version.begin(), version.end(), '.'), version.end());
-    server_data.set_version(stoi(version));
+    try {
+        server_data.set_version(std::stoi(version));
+    } catch (...) {
+        PRINT_DEBUG("InitGameServer: not a number: %s\n", pchVersionString);
+        server_data.set_version(0);
+    }
 
     server_data.set_ip(unIP);
     server_data.set_port(usGamePort);
diff --git a/overlay_experimental/steam_overlay.cpp b/overlay_experimental/steam_overlay.cpp
index 26fe2bd..5c0fe4d 100644
--- a/overlay_experimental/steam_overlay.cpp
+++ b/overlay_experimental/steam_overlay.cpp
@@ -801,11 +801,11 @@ void Steam_Overlay::OverlayProc()
                         bool hidden = x.hidden && !achieved;
 
                         ImGui::Separator();
-                        ImGui::Text(x.title.c_str());
+                        ImGui::Text("%s", x.title.c_str());
                         if (x.hidden) {
                             ImGui::Text("hidden achievement");
                         } else {
-                            ImGui::TextWrapped(x.description.c_str());
+                            ImGui::TextWrapped("%s", x.description.c_str());
                         }
 
                         if (achieved) {