diff --git a/docs/encrypted_images.md b/docs/encrypted_images.md
index 239668c..834428f 100644
--- a/docs/encrypted_images.md
+++ b/docs/encrypted_images.md
@@ -148,7 +148,7 @@
 ## [Creating your keys with imgtool](#creating-your-keys-with-imgtool)
 
 `imgtool` can generate keys by using `imgtool keygen -k <output.pem> -t <type>`,
- where type can be one of `rsa-2048`, `rsa-3072`, `ecdsa-p256`, `ecdsa-p224`
+ where type can be one of `rsa-2048`, `rsa-3072`, `ecdsa-p256`
 or `ed25519`. This will generate a keypair or private key.
 
 To extract the public key in source file form, use
diff --git a/scripts/imgtool/image.py b/scripts/imgtool/image.py
index 5fba119..495416b 100644
--- a/scripts/imgtool/image.py
+++ b/scripts/imgtool/image.py
@@ -1,6 +1,6 @@
 # Copyright 2018 Nordic Semiconductor ASA
 # Copyright 2017-2020 Linaro Limited
-# Copyright 2019-2021 Arm Limited
+# Copyright 2019-2023 Arm Limited
 #
 # SPDX-License-Identifier: Apache-2.0
 #
@@ -63,7 +63,6 @@
         'PUBKEY': 0x02,
         'SHA256': 0x10,
         'RSA2048': 0x20,
-        'ECDSA224': 0x21,
         'ECDSA256': 0x22,
         'RSA3072': 0x23,
         'ED25519': 0x24,
diff --git a/scripts/imgtool/main.py b/scripts/imgtool/main.py
index a246bea..8b515d5 100755
--- a/scripts/imgtool/main.py
+++ b/scripts/imgtool/main.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python3
 #
 # Copyright 2017-2020 Linaro Limited
-# Copyright 2019-2021 Arm Limited
+# Copyright 2019-2023 Arm Limited
 #
 # SPDX-License-Identifier: Apache-2.0
 #
@@ -47,10 +47,6 @@
     keys.ECDSA256P1.generate().export_private(keyfile, passwd=passwd)
 
 
-def gen_ecdsa_p224(keyfile, passwd):
-    print("TODO: p-224 not yet implemented")
-
-
 def gen_ed25519(keyfile, passwd):
     keys.Ed25519.generate().export_private(path=keyfile, passwd=passwd)
 
@@ -65,7 +61,6 @@
     'rsa-2048':   gen_rsa2048,
     'rsa-3072':   gen_rsa3072,
     'ecdsa-p256': gen_ecdsa_p256,
-    'ecdsa-p224': gen_ecdsa_p224,
     'ed25519':    gen_ed25519,
     'x25519':     gen_x25519,
 }