diff --git a/R/association-scores.R b/R/association-scores.R
index 40599fa..ddf3f5b 100644
--- a/R/association-scores.R
+++ b/R/association-scores.R
@@ -84,7 +84,7 @@
 #' @export
 #'
 #' @references
-#' Rychlý, Pavel (2008):  A lexicographer-friendly association score. In Proceedings of Recent Advances in Slavonic Natural Language Processing, RASLAN, 6–9. <http://www.fi.muni.cz/usr/sojka/download/raslan2008/13.pdf>.
+#' Rychlý, Pavel (2008):  A lexicographer-friendly association score. In Proceedings of Recent Advances in Slavonic Natural Language Processing, RASLAN, 6–9. <https://www.fi.muni.cz/usr/sojka/download/raslan2008/13.pdf>.
 #'
 
 logDice <-  function(O1, O2, O, N, E, window_size) {
diff --git a/man/association-score-functions.Rd b/man/association-score-functions.Rd
index 1443bd8..3f6b4b7 100644
--- a/man/association-score-functions.Rd
+++ b/man/association-score-functions.Rd
@@ -72,7 +72,7 @@
 
 Thanopoulos, A., Fakotakis, N., Kokkinakis, G. (2002): Comparative evaluation of collocation extraction metrics. In: Proc. of LREC 2002: 620–625.
 
-Rychlý, Pavel (2008):  A lexicographer-friendly association score. In Proceedings of Recent Advances in Slavonic Natural Language Processing, RASLAN, 6–9. \url{http://www.fi.muni.cz/usr/sojka/download/raslan2008/13.pdf}.
+Rychlý, Pavel (2008):  A lexicographer-friendly association score. In Proceedings of Recent Advances in Slavonic Natural Language Processing, RASLAN, 6–9. \url{https://www.fi.muni.cz/usr/sojka/download/raslan2008/13.pdf}.
 
 Dunning, T. (1993): Accurate methods for the statistics of surprise and coincidence. Comput. Linguist. 19, 1 (March 1993), 61-74.