diff --git a/LICENSE.md b/LICENSE.md
index 6d5ef65..dd30ae7 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -20,3 +20,54 @@ The Examples.jl package is licensed under the MIT "Expat" License:
 > OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 > SOFTWARE.
 >
+
+The file src/IJulia.jl contains some utilities copied from the IJulia.jl package
+(https://github.com/JuliaLang/IJulia.jl) which is licensed under the MIT License:
+
+> Copyright (c); 2013 by Steven G. Johnson, Fernando Perez, Jeff Bezanson, Stefan Karpinski, Keno Fischer, and other contributors.
+>
+> Permission is hereby granted, free of charge, to any person obtaining
+> a copy of this software and associated documentation files (the
+> "Software"), to deal in the Software without restriction, including
+> without limitation the rights to use, copy, modify, merge, publish,
+> distribute, sublicense, and/or sell copies of the Software, and to
+> permit persons to whom the Software is furnished to do so, subject to
+> the following conditions:
+>
+> The above copyright notice and this permission notice shall be
+> included in all copies or substantial portions of the Software.
+>
+> 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 AND
+> NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+> LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+> OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+> WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+>
+
+
+The file src/Documenter.jl contains some utilities copied from the Documenter.jl
+package (https://github.com/JuliaDocs/Documenter.jl) which is licensed under
+the MIT "Expat" License:
+
+> Copyright (c) 2016: Michael Hatherly.
+>
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+>
+> The above copyright notice and this permission notice shall be included in all
+> copies or substantial portions of the Software.
+>
+> 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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF 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/src/Documenter.jl b/src/Documenter.jl
index 11bfc5f..ab0bd6a 100644
--- a/src/Documenter.jl
+++ b/src/Documenter.jl
@@ -1,4 +1,5 @@
-# copied from Documenter.jl
+# this file contains some utilities copied from the Documenter.jl package
+# (https://github.com/JuliaDocs/Documenter.jl), see LICENSE.md for license
 module Documenter
 
 @static if VERSION < v"0.7.0-DEV.3951"
diff --git a/src/IJulia.jl b/src/IJulia.jl
index facb772..0293d30 100644
--- a/src/IJulia.jl
+++ b/src/IJulia.jl
@@ -1,4 +1,5 @@
-# minimal (modified) subset of IJulia.jl to evaluate notebooks
+# this file contains some utilities copied from the IJulia.jl package
+# (https://github.com/JuliaLang/IJulia.jl), see LICENSE.md for license
 module IJulia
 
 const text_plain = MIME("text/plain")