diff --git a/LICENSE_1_0.txt b/LICENSE_1_0.txt
new file mode 100644
index 0000000..36b7cd9
--- /dev/null
+++ b/LICENSE_1_0.txt
@@ -0,0 +1,23 @@
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/include/bits/include-all.hpp b/include/bits/include-all.hpp
index 86d5c1d..3cb5911 100644
--- a/include/bits/include-all.hpp
+++ b/include/bits/include-all.hpp
@@ -1,3 +1,7 @@
+//          Copyright Johannes Kapfhammer 2019-2022.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
 #include <algorithm>
 #include <array>
 #include <bitset>
diff --git a/include/bits/soi-dbg.hpp b/include/bits/soi-dbg.hpp
index b116e42..1cab972 100644
--- a/include/bits/soi-dbg.hpp
+++ b/include/bits/soi-dbg.hpp
@@ -1,4 +1,4 @@
-//          Copyright Johannes Kapfhammer 2019.
+//          Copyright Johannes Kapfhammer 2019-2022.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE_1_0.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/include/bits/soi-deprecate.hpp b/include/bits/soi-deprecate.hpp
index f87dddf..b934c2f 100644
--- a/include/bits/soi-deprecate.hpp
+++ b/include/bits/soi-deprecate.hpp
@@ -1,3 +1,7 @@
+//          Copyright Johannes Kapfhammer 2019-2022.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
 #pragma GCC diagnostic error "-Wdeprecated-declarations"
 
 struct endl_is_evil_t {
diff --git a/include/bits/soi-io.hpp b/include/bits/soi-io.hpp
index 14ba043..ad307c9 100644
--- a/include/bits/soi-io.hpp
+++ b/include/bits/soi-io.hpp
@@ -1,3 +1,7 @@
+//          Copyright Johannes Kapfhammer 2019-2022.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
 #include <iostream>
 #include <cassert>
 #include <vector>
diff --git a/include/bits/soi-pretty.hpp b/include/bits/soi-pretty.hpp
index bc304a4..c495e69 100644
--- a/include/bits/soi-pretty.hpp
+++ b/include/bits/soi-pretty.hpp
@@ -1,11 +1,10 @@
-//          Copyright Johannes Kapfhammer 2019.
+//          Copyright Johannes Kapfhammer 2019-2022.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE_1_0.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
 //
 // pretty pretty_printing with c++
 //
-
 #ifndef SOI_PRETTY
 #define SOI_PRETTY
 
diff --git a/include/bits/soi-redirect.hpp b/include/bits/soi-redirect.hpp
index 93a7b95..7267883 100644
--- a/include/bits/soi-redirect.hpp
+++ b/include/bits/soi-redirect.hpp
@@ -1,3 +1,7 @@
+//          Copyright Johannes Kapfhammer 2019-2022.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
 #include <ostream>
 #include <streambuf>
 
diff --git a/include/soi b/include/soi
index 2589d6a..7f09e77 100644
--- a/include/soi
+++ b/include/soi
@@ -4,6 +4,11 @@
    yet.  All will be explained.  This header is primarily used so that you don't
    have to understand every concept all at once.
 */
+//          Copyright Johannes Kapfhammer 2019-2022.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
 
 #include "bits/include-all.hpp"