diff --git a/scripts/abi_check.py b/scripts/abi_check.py
index c2aca50..b8fc9b8 100755
--- a/scripts/abi_check.py
+++ b/scripts/abi_check.py
@@ -1,9 +1,5 @@
 #!/usr/bin/env python3
 """
-This file is part of Mbed TLS (https://tls.mbed.org)
-
-Copyright (c) 2018, Arm Limited, All Rights Reserved
-
 Purpose
 
 This script is a small wrapper around the abi-compliance-checker and
@@ -15,6 +11,23 @@
 while running the script. Note: must be run from Mbed TLS root.
 """
 
+# Copyright (c) 2018, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
+
 import os
 import sys
 import traceback
diff --git a/scripts/apidoc_full.sh b/scripts/apidoc_full.sh
index a8e4845..f270bf4 100755
--- a/scripts/apidoc_full.sh
+++ b/scripts/apidoc_full.sh
@@ -8,6 +8,19 @@
 # when multiple targets are invoked in the same parallel build.
 #
 # Copyright (C) 2016, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/bump_version.sh b/scripts/bump_version.sh
index cf875c8..88e3a46 100755
--- a/scripts/bump_version.sh
+++ b/scripts/bump_version.sh
@@ -1,8 +1,21 @@
 #!/bin/bash
 #
-# This file is part of mbed TLS (https://tls.mbed.org)
-#
 # Copyright (c) 2012-2016, ARM Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
 #
 # Purpose
 #
diff --git a/scripts/ecc-heap.sh b/scripts/ecc-heap.sh
index 3231f7c..1a2a6d1 100755
--- a/scripts/ecc-heap.sh
+++ b/scripts/ecc-heap.sh
@@ -8,6 +8,19 @@
 # scripts/ecc-heap.sh | tee ecc-heap.log
 #
 # Copyright (C) 2014-2015, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/footprint.sh b/scripts/footprint.sh
index 961a0d6..de7b68f 100755
--- a/scripts/footprint.sh
+++ b/scripts/footprint.sh
@@ -1,8 +1,21 @@
 #!/bin/sh
 #
-# This file is part of mbed TLS (https://tls.mbed.org)
-#
 # Copyright (c) 2015-2016, ARM Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
 #
 # Purpose
 #
diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index 81e5c46..f3814f4 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -6,6 +6,19 @@
 # or generate_errors.pl include_dir data_dir error_file
 #
 # Copyright (C) 2011-2020, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/generate_features.pl b/scripts/generate_features.pl
index 3c04991..e60bb88 100755
--- a/scripts/generate_features.pl
+++ b/scripts/generate_features.pl
@@ -1,6 +1,19 @@
 #!/usr/bin/env perl
 #
 # Copyright (C) 2014-2015, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/generate_psa_constants.py b/scripts/generate_psa_constants.py
index 9fbccd3..3d2e681 100755
--- a/scripts/generate_psa_constants.py
+++ b/scripts/generate_psa_constants.py
@@ -12,6 +12,19 @@
 """
 
 # Copyright (C) 2018-2020, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/generate_query_config.pl b/scripts/generate_query_config.pl
index 26778d3..c9ef838 100755
--- a/scripts/generate_query_config.pl
+++ b/scripts/generate_query_config.pl
@@ -17,6 +17,19 @@
 # Usage: ./scripts/generate_query_config.pl without arguments
 #
 # Copyright (C) 2018-2019, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/generate_visualc_files.pl b/scripts/generate_visualc_files.pl
index 2685970..d72d19d 100755
--- a/scripts/generate_visualc_files.pl
+++ b/scripts/generate_visualc_files.pl
@@ -7,6 +7,19 @@
 # Takes no argument.
 #
 # Copyright (C) 2013-2020, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/massif_max.pl b/scripts/massif_max.pl
index f7fa919..f5d870f 100755
--- a/scripts/massif_max.pl
+++ b/scripts/massif_max.pl
@@ -3,6 +3,19 @@
 # Parse a massif.out.xxx file and output peak total memory usage
 #
 # Copyright (C) 2014, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/memory.sh b/scripts/memory.sh
index 5135495..15693a0 100755
--- a/scripts/memory.sh
+++ b/scripts/memory.sh
@@ -7,6 +7,19 @@
 # since for memory we want debug information.
 #
 # Copyright (C) 2014-2015, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
diff --git a/scripts/output_env.sh b/scripts/output_env.sh
index 3545279..0044a22 100755
--- a/scripts/output_env.sh
+++ b/scripts/output_env.sh
@@ -2,9 +2,22 @@
 
 # output_env.sh
 #
-# This file is part of mbed TLS (https://tls.mbed.org)
-#
 # Copyright (c) 2016, ARM Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
 #
 # Purpose
 #
diff --git a/scripts/rename.pl b/scripts/rename.pl
index fb42809..1e8dbf4 100755
--- a/scripts/rename.pl
+++ b/scripts/rename.pl
@@ -1,8 +1,21 @@
 #!/usr/bin/env perl
 #
-# This file is part of mbed TLS (https://tls.mbed.org)
-#
 # Copyright (c) 2015-2016, ARM Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
 #
 # Purpose
 #
diff --git a/scripts/tmp_ignore_makefiles.sh b/scripts/tmp_ignore_makefiles.sh
index 543e44a..1a16540 100755
--- a/scripts/tmp_ignore_makefiles.sh
+++ b/scripts/tmp_ignore_makefiles.sh
@@ -4,6 +4,19 @@
 # git development
 #
 # Copyright (C) 2014, Arm Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # This file is part of Mbed TLS (https://tls.mbed.org)