diff --git a/files/squid/helpers/rules.d/opendsa.rules b/files/squid/helpers/rules.d/opendsa.rules
index 4c36719c8ff49ab46637b8934544252cded77471..724eedbdae57aef32333fb75a67ea981a419afd9 100644
--- a/files/squid/helpers/rules.d/opendsa.rules
+++ b/files/squid/helpers/rules.d/opendsa.rules
@@ -2,6 +2,8 @@
 
 // ^.* false
 
+^https?://www\.ida\.liu\.se/edu/ugrad/datortenta/OpenDSA/Books/TDDD86_200317/.*  true
+
 ^https?://www\.ida\.liu\.se/edu/ugrad/datortenta/OpenDSA/Books/.*                false
 ^https?://www\.ida\.liu\.se/edu/ugrad/datortenta/OpenDSA/lib/.*                  true
 ^https?://www\.ida\.liu\.se/edu/ugrad/datortenta/OpenDSA/JSAV/.*                 true