diff --git a/lang/English.ini b/lang/English.ini
index 2373fde9..1d96cee0 100644
--- a/lang/English.ini
+++ b/lang/English.ini
@@ -25,6 +25,7 @@ LOBBY_NOT_FOUND = "\\#ffa0a0\\The lobby no longer exists!"
 LOBBY_JOIN_FULL = "\\#ffa0a0\\The lobby is full!"
 LOBBY_JOIN_FAILED = "\\#ffa0a0\\Failed to join the lobby!"
 LOBBY_PASSWORD_INCORRECT = "\\#ffa0a0\\Entered the wrong lobby password!"
+COOPNET_VERSION = "\\#ffa0a0\\Your version is no longer compatible with CoopNet. Update the game!"
 
 [CHAT]
 KICKING = "Kicking '@'!"
diff --git a/lib/coopnet/include/libcoopnet.h b/lib/coopnet/include/libcoopnet.h
index 47ceddb8..f3a9d6e3 100644
--- a/lib/coopnet/include/libcoopnet.h
+++ b/lib/coopnet/include/libcoopnet.h
@@ -21,6 +21,7 @@ enum MPacketErrorNumber {
     MERR_LOBBY_JOIN_FULL,
     MERR_LOBBY_JOIN_FAILED,
     MERR_LOBBY_PASSWORD_INCORRECT,
+    MERR_COOPNET_VERSION,
     MERR_MAX,
 };
 
diff --git a/lib/coopnet/linux/libcoopnet.a b/lib/coopnet/linux/libcoopnet.a
index 38041dcd..554b5afe 100644
Binary files a/lib/coopnet/linux/libcoopnet.a and b/lib/coopnet/linux/libcoopnet.a differ
diff --git a/src/pc/network/coopnet/coopnet.c b/src/pc/network/coopnet/coopnet.c
index cd4aafea..e4065c61 100644
--- a/src/pc/network/coopnet/coopnet.c
+++ b/src/pc/network/coopnet/coopnet.c
@@ -92,6 +92,10 @@ static void coopnet_on_lobby_left(uint64_t lobbyId, uint64_t userId) {
 
 static void coopnet_on_error(enum MPacketErrorNumber error) {
     switch (error) {
+        case MERR_COOPNET_VERSION:
+            djui_popup_create(DLANG(NOTIF, COOPNET_VERSION), 2);
+            network_shutdown(false, false, false, false);
+            break;
         case MERR_LOBBY_NOT_FOUND:
             djui_popup_create(DLANG(NOTIF, LOBBY_NOT_FOUND), 2);
             network_shutdown(false, false, false, false);