diff --git a/README.md b/README.md
index 7e348e7..5c5a959 100644
--- a/README.md
+++ b/README.md
@@ -12,9 +12,9 @@ This specification is available in *doc* directory and at <https://g10code.com/p
 The application supports:
 
 - RSA with key up to 3072 bits
-- ECDSA with secp256k1
+- ECDSA with secp256R1 and secp256K1
 - EDDSA with Ed25519 curve
-- ECDH with secp256k1 and curve25519 curves
+- ECDH with secp256R1, secp256K1 and curve25519 curves
 
 ## Installation and Usage
 
diff --git a/doc/user/app-openpgp.pdf b/doc/user/app-openpgp.pdf
index 57c94c8..ccab45b 100644
Binary files a/doc/user/app-openpgp.pdf and b/doc/user/app-openpgp.pdf differ
diff --git a/doc/user/app-openpgp.rst b/doc/user/app-openpgp.rst
index b1a5f13..d665220 100644
--- a/doc/user/app-openpgp.rst
+++ b/doc/user/app-openpgp.rst
@@ -51,9 +51,9 @@ This specification is available in doc directory at [G10CODE]_.
 The application supports:
 
 - RSA with key up to 3072 bits
-- ECDSA with secp256R1
+- ECDSA with secp256R1 and secp256K1
 - EDDSA with Ed25519 curve
-- ECDH with secp256R1 and curve25519 curves
+- ECDH with secp256R1, secp256K1 and curve25519 curves
 
 This release has known missing parts (see also [GPGADD]_):
 
@@ -290,6 +290,7 @@ This 3 commands fix, in that order, the template for Signature, Decryption, Auth
 Supported curve name are:
 
 - secp256k1 with tag 19
+- secp256r1 with tag 19
 - nistp256 with tag 19
 - cv25519 (only for key 2)
 - ed25519  with tag 22 (only for key 1 and 3)
diff --git a/src/gpg_init.c b/src/gpg_init.c
index 1cd4185..45b3482 100644
--- a/src/gpg_init.c
+++ b/src/gpg_init.c
@@ -40,12 +40,9 @@ const unsigned char C_OID_SECP384R1[5] = {
 const unsigned char C_OID_SECP521R1[5] = {
   0x2B, 0x81, 0x04, 0x00, 0x23
 };
-
-//secp256k1: 1.3.132.0.10
-const unsigned char C_OID_SECP256K1[5] = {
-  0x2B, 0x81, 0x04, 0x00, 0x0A
-};
 */
+// secp256k1: 1.3.132.0.10
+const unsigned char C_OID_SECP256K1[5] = {0x2B, 0x81, 0x04, 0x00, 0x0A};
 
 /*
 //brainpool 256t1: 1.3.36.3.3.2.8.1.1.8
@@ -97,20 +94,23 @@ unsigned int gpg_oid2curve(unsigned char *oid, unsigned int len) {
     if ((len == sizeof(C_OID_SECP256R1)) && (memcmp(oid, C_OID_SECP256R1, len) == 0)) {
         return CX_CURVE_SECP256R1;
     }
-    /*
-    if ( (len == sizeof(C_OID_SECP256K1)) && (memcmp(oid, C_OID_SECP256K1, len)==0) ) {
-      return CX_CURVE_SECP256K1;
-    }
 
+    if ((len == sizeof(C_OID_SECP256K1)) && (memcmp(oid, C_OID_SECP256K1, len) == 0)) {
+        return CX_CURVE_SECP256K1;
+    }
+    /*
     if ( (len == sizeof(C_OID_SECP384R1)) && (memcmp(oid, C_OID_SECP384R1, len)==0) ) {
       return CX_CURVE_SECP384R1;
     }
     if ( (len == sizeof(C_OID_SECP521R1)) && (memcmp(oid, C_OID_SECP521R1, len)==0) ) {
       return CX_CURVE_SECP521R1;
     }
-   */
+    */
 
     /*
+    if ( (len == sizeof(C_OID_BRAINPOOL256T1)) && (memcmp(oid, C_OID_BRAINPOOL256T1, len)==0) ) {
+      return CX_CURVE_BrainPoolP256T1;
+    }
     if ( (len == sizeof(C_OID_BRAINPOOL256R1)) && (memcmp(oid, C_OID_BRAINPOOL256R1, len)==0) ) {
       return CX_CURVE_BrainPoolP256R1;
     }
@@ -120,7 +120,7 @@ unsigned int gpg_oid2curve(unsigned char *oid, unsigned int len) {
     if ( (len == sizeof(C_OID_BRAINPOOL512R1)) && (memcmp(oid, C_OID_BRAINPOOL512R1, len)==0) ) {
       return CX_CURVE_BrainPoolP512R1;
     }
-   */
+    */
     if ((len == sizeof(C_OID_Ed25519)) && (memcmp(oid, C_OID_Ed25519, len) == 0)) {
         return CX_CURVE_Ed25519;
     }
@@ -129,14 +129,6 @@ unsigned int gpg_oid2curve(unsigned char *oid, unsigned int len) {
         return CX_CURVE_Curve25519;
     }
 
-    /*
-    if ( (len == sizeof(C_OID_SECP256K1)) && (memcmp(oid, C_OID_SECP256K1, len)==0) ) {
-      return CX_CURVE_256K1;
-    }
-    if ( (len == sizeof(C_OID_BRAINPOOL256T1)) && (memcmp(oid, C_OID_BRAINPOOL256T1, len)==0) ) {
-      return CX_CURVE_BrainPoolP256T1;
-    }
-    */
     return CX_CURVE_NONE;
 }
 
@@ -146,11 +138,11 @@ unsigned char *gpg_curve2oid(unsigned int cv, unsigned int *len) {
             *len = sizeof(C_OID_SECP256R1);
             return (unsigned char *) PIC(C_OID_SECP256R1);
 
-        /*
         case CX_CURVE_SECP256K1:
-          *len = sizeof(C_OID_SECP256K1);
-          return   (unsigned char*)PIC(C_OID_SECP256K1);
+            *len = sizeof(C_OID_SECP256K1);
+            return (unsigned char *) PIC(C_OID_SECP256K1);
 
+        /*
         case CX_CURVE_SECP384R1:
           *len = sizeof(C_OID_SECP384R1);
           return   (unsigned char*)PIC(C_OID_SECP384R1);
@@ -188,6 +180,7 @@ unsigned char *gpg_curve2oid(unsigned int cv, unsigned int *len) {
 
 unsigned int gpg_curve2domainlen(unsigned int cv) {
     switch (cv) {
+        case CX_CURVE_SECP256K1:
         case CX_CURVE_SECP256R1:
         case CX_CURVE_Ed25519:
         case CX_CURVE_Curve25519: