diff --git a/friction.m b/friction.m
index 8f9306b..b4f4b26 100644
--- a/friction.m
+++ b/friction.m
@@ -27,7 +27,7 @@
 %   Cite as:
 %      Santos-Ruiz, Ildeberto. (2018, November 9).
 %      Friction and Roughness. Zenodo.
-%      http://doi.org/10.5281/zenodo.1481992
+%      http://doi.org/10.5281/zenodo.1481562
 %---------------------------------------------------------
 if nargin < 3
     method = 'iterative';
diff --git a/roughness.m b/roughness.m
index 0b17922..edcfe63 100644
--- a/roughness.m
+++ b/roughness.m
@@ -30,7 +30,7 @@
 %   Cite as:
 %      Santos-Ruiz, Ildeberto. (2018, November 9).
 %      Friction and Roughness. Zenodo.
-%      http://doi.org/10.5281/zenodo.1481992
+%      http://doi.org/10.5281/zenodo.1481562
 %-----------------------------------------------------------
 
 switch nargin