diff --git a/deps/external_dependency.cmake b/deps/external_dependency.cmake
index 7012e9b0..435e1720 100644
--- a/deps/external_dependency.cmake
+++ b/deps/external_dependency.cmake
@@ -1,3 +1,24 @@
+###################################################################################
+#
+# APP4TRIQS: a Toolbox for Research in Interacting Quantum Systems
+#
+# Copyright (C) 2020 Simons Foundation
+#    authors: N. Wentzell
+#
+# APP4TRIQS 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 3 of the License, or (at your option) any later
+# version.
+#
+# APP4TRIQS 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
+# APP4TRIQS. If not, see <http://www.gnu.org/licenses/>.
+#
+###################################################################################
 
 function(external_dependency)
   cmake_parse_arguments(ARG "EXCLUDE_FROM_ALL;BUILD_ALWAYS" "VERSION;GIT_REPO;GIT_TAG" "" ${ARGN})
diff --git a/share/cmake/extract_flags.cmake b/share/cmake/extract_flags.cmake
index fdc57abe..0b83247f 100644
--- a/share/cmake/extract_flags.cmake
+++ b/share/cmake/extract_flags.cmake
@@ -1,3 +1,25 @@
+###################################################################################
+#
+# TRIQS: a Toolbox for Research in Interacting Quantum Systems
+#
+# Copyright (C) 2019-2020 Simons Foundation
+#    author: N. Wentzell
+#
+# TRIQS 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 3 of the License, or (at your option) any later
+# version.
+#
+# TRIQS 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
+# TRIQS. If not, see <http://www.gnu.org/licenses/>.
+#
+###################################################################################
+
 # Recursively fetch all targets that the interface of a target depends upon
 macro(get_all_interface_targets name target)
   get_property(TARGET_LINK_LIBRARIES TARGET ${target} PROPERTY INTERFACE_LINK_LIBRARIES)