diff --git a/.gitignore b/.gitignore
index 348eed9..f65bfb8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,7 @@
 .DS_Store
 .*.swp
 bin
-lib
 src
-build
 include/openssl
 *.gz
 *.framework
diff --git a/README.md b/README.md
index 46afe4e..11b1412 100644
--- a/README.md
+++ b/README.md
@@ -53,4 +53,9 @@ Dynamically linked:
 ```
 
 # Original project
+
 * <https://github.com/x2on/OpenSSL-for-iPhone>
+
+# Acknowledgements
+
+This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (<https://www.openssl.org/>)