diff --git a/platformio/builder/scripts/ststm32.py b/platformio/builder/scripts/ststm32.py
index 42047105..34eee8d8 100644
--- a/platformio/builder/scripts/ststm32.py
+++ b/platformio/builder/scripts/ststm32.py
@@ -16,7 +16,6 @@
     Builder for ST STM32 Series ARM microcontrollers.
 """
 
-import platform
 from os.path import isfile, join
 
 from SCons.Script import (COMMAND_LINE_TARGETS, AlwaysBuild, Default,
diff --git a/platformio/libmanager.py b/platformio/libmanager.py
index 01631b86..964b10d0 100644
--- a/platformio/libmanager.py
+++ b/platformio/libmanager.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import json
 import re
 from os import listdir, makedirs, remove, rename
 from os.path import isdir, isfile, join