diff --git a/hash.c b/hash.c
index b403cb1..4f4ff0b 100644
--- a/hash.c
+++ b/hash.c
@@ -1,5 +1,5 @@
 /*
-hash.c version 20150811
+hash.c version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/hash.h b/hash.h
index 8e4dd9f..bd6638f 100644
--- a/hash.h
+++ b/hash.h
@@ -1,5 +1,5 @@
 /*
-hash.h version 20150811
+hash.h version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/prg.c b/prg.c
index 4caee47..4688e5c 100644
--- a/prg.c
+++ b/prg.c
@@ -1,5 +1,5 @@
 /*
-prg.c version 20150811
+prg.c version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/prg.h b/prg.h
index 750414e..b74afdb 100644
--- a/prg.h
+++ b/prg.h
@@ -1,5 +1,5 @@
 /*
-prg.h version 20150811
+prg.h version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/wots.c b/wots.c
index 41e3eec..1280c1b 100644
--- a/wots.c
+++ b/wots.c
@@ -1,5 +1,5 @@
 /*
-wots.c version 20150811
+wots.c version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/wots.h b/wots.h
index febc859..83b4558 100644
--- a/wots.h
+++ b/wots.h
@@ -1,5 +1,5 @@
 /*
-wots.h version 20150811
+wots.h version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/xmss.c b/xmss.c
index 1c77305..7f8631f 100644
--- a/xmss.c
+++ b/xmss.c
@@ -1,5 +1,5 @@
 /*
-xmss.c version 20150811
+xmss.c version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/xmss.h b/xmss.h
index efabb89..0fb3b3d 100644
--- a/xmss.h
+++ b/xmss.h
@@ -1,5 +1,5 @@
 /*
-xmss.h version 20150811
+xmss.h version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/xmss_commons.c b/xmss_commons.c
index 745de5e..16b8bae 100644
--- a/xmss_commons.c
+++ b/xmss_commons.c
@@ -1,5 +1,5 @@
 /*
-xmss_commons.c version 20150811
+xmss_commons.c version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/xmss_commons.h b/xmss_commons.h
index c8f0ab4..b378e50 100644
--- a/xmss_commons.h
+++ b/xmss_commons.h
@@ -1,5 +1,5 @@
 /*
-xmss_commons.h version 20150811
+xmss_commons.h version 20151120
 Andreas Hülsing
 Public domain.
 */
diff --git a/xmss_fast.c b/xmss_fast.c
index f833029..dd80f05 100644
--- a/xmss_fast.c
+++ b/xmss_fast.c
@@ -1,6 +1,6 @@
 /*
-xmss.c version 20150811
-Andreas Hülsing
+xmss_fast.c version 20151120
+Andreas Hülsing and Joost Rijneveld
 Public domain.
 */
 
diff --git a/xmss_fast.h b/xmss_fast.h
index 9d8ecca..f5968ca 100644
--- a/xmss_fast.h
+++ b/xmss_fast.h
@@ -1,6 +1,6 @@
 /*
-xmss.h version 20150811
-Andreas Hülsing
+xmss_fast.h version 20151120
+Andreas Hülsing and Joost Rijneveld
 Public domain.
 */