diff --git a/platformio.ini b/platformio.ini
index 73862bf38..7f91d35df 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -21,8 +21,8 @@ extra_configs =
   pio_local.ini
 
 [common]
-core_build_flags = -std=c++17 -std=gnu++17 -O3 -Wno-type-limits -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -Wno-format -Wno-missing-field-initializers
-core_unbuild_flags = -std=gnu++11
+core_build_flags = -std=c++17 -std=gnu++17 -O3 -flto=auto -Wno-type-limits -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -Wno-format -Wno-missing-field-initializers
+core_unbuild_flags = -std=gnu++11 -fno-lto
 
 my_build_flags =
 
@@ -184,7 +184,6 @@ build_src_flags =
   -I./lib/uuid-common/src
   -I./lib/uuid-console/src
   -I./lib/uuid-log/src
-  -I./lib/semver
   -I./lib/PButton
   -I./lib/espMqttClient/src
   -I./lib/espMqttClient/src/Transport
@@ -224,7 +223,6 @@ build_src_flags =
   -I./lib/uuid-common/src
   -I./lib/uuid-console/src
   -I./lib/uuid-log/src
-  -I./lib/semver
   -I./lib/PButton
   -I./lib/espMqttClient/src
   -I./lib/espMqttClient/src/Transport