diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9605fbf7b..71fa22dba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,7 +51,7 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "(Apple)?[Cc]lang")
 
     set(OT_CFLAGS
         $<$<COMPILE_LANGUAGE:C>:${OT_CFLAGS} -Wall -Wextra -Wshadow -pedantic-errors>
-        $<$<COMPILE_LANGUAGE:CXX>:${OT_CFLAGS} -Wall -Wextra -Wshadow -Wno-c++14-compat -fno-exceptions>
+        $<$<COMPILE_LANGUAGE:CXX>:${OT_CFLAGS} -Wall -Wextra -Wshadow -Wno-c++14-compat -fno-exceptions -pedantic-errors>
     )
 endif()
 
diff --git a/src/cli/CMakeLists.txt b/src/cli/CMakeLists.txt
index ea2c74271..6a7e28a14 100644
--- a/src/cli/CMakeLists.txt
+++ b/src/cli/CMakeLists.txt
@@ -33,7 +33,7 @@ set_target_properties(
     openthread-cli-ftd openthread-cli-mtd
     PROPERTIES
         C_STANDARD 99
-        CXX_STANDARD 98
+        CXX_STANDARD 11
 )
 
 target_compile_definitions(openthread-cli-ftd PRIVATE
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index b4de4af9b..3a4c3b092 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -34,7 +34,7 @@ set_target_properties(
     openthread-ftd openthread-mtd openthread-radio
     PROPERTIES
         C_STANDARD 99
-        CXX_STANDARD 98
+        CXX_STANDARD 11
 )
 
 target_compile_definitions(openthread-ftd PRIVATE
diff --git a/src/lib/hdlc/CMakeLists.txt b/src/lib/hdlc/CMakeLists.txt
index a56185a52..1a5ced0ad 100644
--- a/src/lib/hdlc/CMakeLists.txt
+++ b/src/lib/hdlc/CMakeLists.txt
@@ -30,6 +30,13 @@ add_library(openthread-hdlc
     hdlc.cpp
 )
 
+set_target_properties(
+    openthread-hdlc
+    PROPERTIES
+        C_STANDARD 99
+        CXX_STANDARD 11
+)
+
 target_include_directories(openthread-hdlc
     PUBLIC
         ${OT_PUBLIC_INCLUDES}
diff --git a/src/lib/spinel/CMakeLists.txt b/src/lib/spinel/CMakeLists.txt
index fd901ca7a..fd5f38644 100644
--- a/src/lib/spinel/CMakeLists.txt
+++ b/src/lib/spinel/CMakeLists.txt
@@ -29,6 +29,13 @@
 add_library(openthread-spinel-ncp)
 add_library(openthread-spinel-rcp)
 
+set_target_properties(
+    openthread-spinel-ncp openthread-spinel-rcp
+    PROPERTIES
+        C_STANDARD 99
+        CXX_STANDARD 11
+)
+
 target_compile_definitions(openthread-spinel-ncp PRIVATE
     ${OT_PRIVATE_DEFINES}
     OPENTHREAD_FTD=1
diff --git a/src/ncp/CMakeLists.txt b/src/ncp/CMakeLists.txt
index 01fa7cc97..154f5ae25 100644
--- a/src/ncp/CMakeLists.txt
+++ b/src/ncp/CMakeLists.txt
@@ -32,10 +32,10 @@ add_library(openthread-rcp)
 
 # We depend on C++11 to validate that NCP handlers are sorted.
 set_target_properties(
-    openthread-ncp-mtd openthread-rcp
+    openthread-ncp-ftd openthread-ncp-mtd openthread-rcp
     PROPERTIES
         C_STANDARD 99
-        CXX_STANDARD 98
+        CXX_STANDARD 11
 )
 
 target_compile_definitions(openthread-ncp-ftd PRIVATE