diff --git a/acb_hypgeom/gamma_lower_series.c b/acb_hypgeom/gamma_lower_series.c
index bfb3dd18..7bcb9060 100644
--- a/acb_hypgeom/gamma_lower_series.c
+++ b/acb_hypgeom/gamma_lower_series.c
@@ -1,27 +1,13 @@
-/*=============================================================================
-
-    This file is part of ARB.
-
-    ARB is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    ARB is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with ARB; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-=============================================================================*/
-/******************************************************************************
-
+/*
     Copyright (C) 2016 Arb authors
 
-******************************************************************************/
+    This file is part of Arb.
+
+    Arb is free software: you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.  See <http://www.gnu.org/licenses/>.
+*/
 
 #include "acb_poly.h"
 #include "acb_hypgeom.h"
diff --git a/acb_hypgeom/test/t-gamma_lower_series.c b/acb_hypgeom/test/t-gamma_lower_series.c
index 92fa4245..1be6ceb1 100644
--- a/acb_hypgeom/test/t-gamma_lower_series.c
+++ b/acb_hypgeom/test/t-gamma_lower_series.c
@@ -1,27 +1,13 @@
-/*=============================================================================
-
-    This file is part of ARB.
-
-    ARB is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    ARB is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with ARB; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-=============================================================================*/
-/******************************************************************************
-
+/*
     Copyright (C) 2016 Arb authors
 
-******************************************************************************/
+    This file is part of Arb.
+
+    Arb is free software: you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.  See <http://www.gnu.org/licenses/>.
+*/
 
 #include "acb_poly.h"
 #include "acb_hypgeom.h"