diff --git a/lib/domains/ci/ita-education b/lib/domains/ci/ita-education.txt
similarity index 100%
rename from lib/domains/ci/ita-education
rename to lib/domains/ci/ita-education.txt
diff --git a/lib/domains/com/emlyon/edu b/lib/domains/com/emlyon/edu.txt
similarity index 100%
rename from lib/domains/com/emlyon/edu
rename to lib/domains/com/emlyon/edu.txt
diff --git a/lib/domains/de/whg-rie.lernsax b/lib/domains/de/lernsax/whg-rie.txt
similarity index 100%
rename from lib/domains/de/whg-rie.lernsax
rename to lib/domains/de/lernsax/whg-rie.txt
diff --git a/lib/domains/edu/laccd.edu b/lib/domains/edu/laccd.txt
similarity index 100%
rename from lib/domains/edu/laccd.edu
rename to lib/domains/edu/laccd.txt
diff --git a/lib/domains/eus/doloresibarruribhi.eus b/lib/domains/eus/doloresibarruribhi.txt
similarity index 100%
rename from lib/domains/eus/doloresibarruribhi.eus
rename to lib/domains/eus/doloresibarruribhi.txt
diff --git a/lib/domains/in/edu/cet.text b/lib/domains/in/edu/cet.txt
similarity index 100%
rename from lib/domains/in/edu/cet.text
rename to lib/domains/in/edu/cet.txt
diff --git a/lib/domains/nl/horizoncollege.nl b/lib/domains/nl/horizoncollege.nl
deleted file mode 100644
index ff9e5df075..0000000000
--- a/lib/domains/nl/horizoncollege.nl
+++ /dev/null
@@ -1 +0,0 @@
-ROC Horizon College