diff --git a/scripts/mbedtls_dev/crypto_knowledge.py b/scripts/mbedtls_dev/crypto_knowledge.py
index 642e725..500acea 100644
--- a/scripts/mbedtls_dev/crypto_knowledge.py
+++ b/scripts/mbedtls_dev/crypto_knowledge.py
@@ -78,7 +78,7 @@
         'PSA_ECC_FAMILY_SECT_R2': (163,),
         'PSA_ECC_FAMILY_BRAINPOOL_P_R1': (160, 192, 224, 256, 320, 384, 512),
         'PSA_ECC_FAMILY_MONTGOMERY': (255, 448),
-        'PSA_ECC_FAMILY_TWISTED_EDWARDS': (256, 448),
+        'PSA_ECC_FAMILY_TWISTED_EDWARDS': (255, 448),
     }
     KEY_TYPE_SIZES = {
         'PSA_KEY_TYPE_AES': (128, 192, 256), # exhaustive