diff --git a/dev-lang/swi_prolog/swi_prolog-6.6.6.recipe b/dev-lang/swi_prolog/swi_prolog-6.6.6.recipe
index ce77ccc7c..86128c167 100644
--- a/dev-lang/swi_prolog/swi_prolog-6.6.6.recipe
+++ b/dev-lang/swi_prolog/swi_prolog-6.6.6.recipe
@@ -6,12 +6,12 @@ features, libraries for constraint logic programming, multithreading, unit \
 testing, GUI, interfacing to Java, ODBC and others, literate programming, a web \
 server, SGML, RDF, RDFS, developer tools (including an IDE with a GUI debugger \
 and GUI profiler), and extensive documentation."
-HOMEPAGE="http://www.swi-prolog.org/"
+HOMEPAGE="https://www.swi-prolog.org/"
 COPYRIGHT="1985-2012, University of Amsterdam, VU University Amsterdam"
 LICENSE="GNU LGPL v2.1
 	SWI-Prolog"
-REVISION="2"
-SOURCE_URI="http://www.swi-prolog.org/download/stable/src/pl-6.6.6.tar.gz"
+REVISION="3"
+SOURCE_URI="https://www.swi-prolog.org/download/stable/src/pl-6.6.6.tar.gz"
 CHECKSUM_SHA256="9f80bb274e2f31fd68b0acbe35982c012d5f8311dbe44ec1d8d04351a776996d"
 SOURCE_DIR="pl-6.6.6"
 PATCHES="swi_prolog-6.2.0.patch"