diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2025a43..fc1d2e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ set(LOG_LEVEL ARDUHAL_LOG_LEVEL_NONE)
 #add_compile_definitions(DEBUG_NUKI_READABLE_DATA)
 
 # Length of char arrays to store certificates for MQTTS
-add_compile_definitions(TLS_CA_MAX_SIZE=1500)
+add_compile_definitions(TLS_CA_MAX_SIZE=2200)
 add_compile_definitions(TLS_CERT_MAX_SIZE=1500)
 add_compile_definitions(TLS_KEY_MAX_SIZE=1800)
 add_compile_definitions(TX_PAYLOAD_BUFFER_SIZE=6144)