diff --git a/bib.bib b/bib.bib
index d95b096..c75e55e 100644
--- a/bib.bib
+++ b/bib.bib
@@ -1,20 +1,20 @@
 @misc{ref1,
         author = "Wikipedia",
         title = "{RSA} (Cryptosystem) --- {W}ikipedia{,} {D}ie freie {E}nzyklopädie",
-        howpublished = "\url{https://en.wikipedia.org/wiki/RSA_(cryptosystem)}"
+        howpublished = "\url{https://en.wikipedia.org/wiki/RSA_(cryptosystem)}",
         year = "2016",
 }
 
 @misc{ref2,
         author = "Wikipedia",
         title = "{RSA}-{K}ryptosystem --- {W}ikipedia{,} {D}ie freie {E}nzyklopädie",
-        howpublished = "\url{https://de.wikipedia.org/wiki/RSA-Kryptosystem}"
+        howpublished = "\url{https://de.wikipedia.org/wiki/RSA-Kryptosystem}",
         year = "2016",
 }
 
 @misc{ref3,
         author = "L. Van Houtven",
         title = "Crypto 101",
-        howpublished = "\url{https://www.crypto101.io/}"
+        howpublished = "\url{https://www.crypto101.io/}",
         year = "2016",
 }