diff --git a/configs/conf-available/15-filter-pcre.conf b/configs/conf-available/15-filter-pcre.conf
index d090d69..ad702e5 100644
--- a/configs/conf-available/15-filter-pcre.conf
+++ b/configs/conf-available/15-filter-pcre.conf
@@ -1,5 +1,5 @@
 [filter:pcre]
 load  = libf2b_filter_pcre.so
-icase = no
+icase = yes
 study = yes
 usejit = no
diff --git a/configs/conf-available/15-filter-preg.conf b/configs/conf-available/15-filter-preg.conf
index a764326..03d878d 100644
--- a/configs/conf-available/15-filter-preg.conf
+++ b/configs/conf-available/15-filter-preg.conf
@@ -1,3 +1,3 @@
 [filter:preg]
 load  = libf2b_filter_preg.so
-icase = no
+icase = yes