diff --git a/HISTORY.rst b/HISTORY.rst
index 1ba82a85..afda1a3d 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -10,6 +10,8 @@ PlatformIO 2.0
 * Added generic targets to Eclipse IDE: Build, Clean, Upload, Upload SPIFFS
   image, Upload using Programmer
   (`issue #427 <https://github.com/platformio/platformio/issues/427>`_)
+* Updated Teensy Arduino Framework to 1.26
+  (`issue #434 <https://github.com/platformio/platformio/issues/434>`_)
 * Fixed uploading of EEPROM data using ``uploadeep`` target for Atmel AVR
   development platform
 * Fixed project generator for CLion IDE
diff --git a/platformio/boards/espressif.json b/platformio/boards/espressif.json
index 80825526..5bef69e7 100644
--- a/platformio/boards/espressif.json
+++ b/platformio/boards/espressif.json
@@ -78,7 +78,7 @@
             "variant": "nodemcu"
         },
         "frameworks": ["arduino"],
-        "name": "NodeMCU 0.9 & 1.0",
+        "name": "NodeMCU 0.9 / 1.0",
         "platform": "espressif",
         "upload": {
             "maximum_ram_size": 81920,
diff --git a/platformio/boards/teensy.json b/platformio/boards/teensy.json
index a7eca4ac..dd4816ae 100644
--- a/platformio/boards/teensy.json
+++ b/platformio/boards/teensy.json
@@ -63,7 +63,7 @@
             "cpu": "cortex-m4"
         },
         "frameworks": ["arduino", "mbed"],
-        "name": "Teensy 3.1",
+        "name": "Teensy 3.1 / 3.2",
         "platform": "teensy",
         "upload": {
             "maximum_ram_size": 65536,
diff --git a/platformio/builder/scripts/atmelavr.py b/platformio/builder/scripts/atmelavr.py
index 7699bb65..4822499a 100644
--- a/platformio/builder/scripts/atmelavr.py
+++ b/platformio/builder/scripts/atmelavr.py
@@ -78,6 +78,16 @@ env = DefaultEnvironment()
 
 SConscript(env.subst(join("$PIOBUILDER_DIR", "scripts", "baseavr.py")))
 
+env.Append(
+    CFLAGS=[
+        "-std=gnu11"
+    ],
+
+    CXXFLAGS=[
+        "-std=gnu++11"
+    ]
+)
+
 if "digispark" in env.get(
         "BOARD_OPTIONS", {}).get("build", {}).get("core", ""):
     env.Replace(
diff --git a/platformio/builder/scripts/basearm.py b/platformio/builder/scripts/basearm.py
index 0e8ff6d8..ff11882d 100644
--- a/platformio/builder/scripts/basearm.py
+++ b/platformio/builder/scripts/basearm.py
@@ -41,8 +41,7 @@ env.Replace(
         "-Wall",
         "-mthumb",
         "-mcpu=${BOARD_OPTIONS['build']['cpu']}",
-        "-nostdlib",
-        "-MMD"  # output dependancy info
+        "-nostdlib"
     ],
 
     CXXFLAGS=[
diff --git a/platformio/builder/scripts/baseavr.py b/platformio/builder/scripts/baseavr.py
index ce0cabcc..133e17c9 100644
--- a/platformio/builder/scripts/baseavr.py
+++ b/platformio/builder/scripts/baseavr.py
@@ -42,10 +42,7 @@ env.Replace(
         "-mmcu=$BOARD_MCU"
     ],
 
-    CFLAGS=["-std=gnu11"],
-
     CXXFLAGS=[
-        "-std=gnu++11",
         "-fno-exceptions",
         "-fno-threadsafe-statics"
     ],
diff --git a/platformio/builder/scripts/teensy.py b/platformio/builder/scripts/teensy.py
index f3168b88..37bfeb1b 100644
--- a/platformio/builder/scripts/teensy.py
+++ b/platformio/builder/scripts/teensy.py
@@ -28,7 +28,12 @@ if env.get("BOARD_OPTIONS", {}).get("build", {}).get("core") == "teensy":
 elif env.get("BOARD_OPTIONS", {}).get("build", {}).get("core") == "teensy3":
     SConscript(env.subst(join("$PIOBUILDER_DIR", "scripts", "basearm.py")))
     env.Append(
-        LINKFLAGS=["-Wl,--defsym=__rtc_localtime=$UNIX_TIME"]
+        LINKFLAGS=[
+            "-Wl,--defsym=__rtc_localtime=$UNIX_TIME"
+        ],
+        CPPFLAGS=[
+            "-fsingle-precision-constant"
+        ]
     )
 
 env.Append(
diff --git a/platformio/builder/scripts/timsp430.py b/platformio/builder/scripts/timsp430.py
index 96444b4a..525aa5e9 100644
--- a/platformio/builder/scripts/timsp430.py
+++ b/platformio/builder/scripts/timsp430.py
@@ -44,7 +44,6 @@ env.Replace(
         # "-Wall",  # show warnings
         "-ffunction-sections",  # place each function in its own section
         "-fdata-sections",
-        "-MMD",  # output dependancy info
         "-mmcu=$BOARD_MCU"
     ],