diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,22 +70,22 @@
     TYPE OPTIONAL)
 set_package_properties(packagekitqt5 PROPERTIES
     DESCRIPTION "Library that exposes PackageKit resources"
-    URL "http://www.packagekit.org"
+    URL "https://www.freedesktop.org/software/PackageKit/"
     PURPOSE "Required to build the PackageKit backend"
     TYPE OPTIONAL)
 set_package_properties(AppStreamQt PROPERTIES
     DESCRIPTION "Library that lists Appstream resources"
-    URL "http://www.freedesktop.org"
+    URL "https://www.freedesktop.org"
     PURPOSE "Required to build the PackageKit and Flatpak backends"
     TYPE OPTIONAL)
 set_package_properties(FLATPAK PROPERTIES
     DESCRIPTION "Library that exposes flatpak repositories"
-    URL "http://www.freedesktop.org"
+    URL "https://www.freedesktop.org"
     PURPOSE "Required to build the Flatpak backend"
     TYPE OPTIONAL)
 set_package_properties(LIBFWUPD PROPERTIES
     DESCRIPTION "Library that exposes fwupd"
-    URL "http://www.fwupd.org"
+    URL "https://www.fwupd.org"
     PURPOSE "Required to build the Fwupd backend"
     TYPE OPTIONAL)
 
diff --git a/COPYING b/COPYING
--- a/COPYING
+++ b/COPYING
@@ -2,7 +2,7 @@
 		    GNU GENERAL PUBLIC LICENSE
 		       Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -672,5 +672,5 @@
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+<https://www.gnu.org/philosophy/why-not-lgpl.html>.
 
diff --git a/libdiscover/backends/CMakeLists.txt b/libdiscover/backends/CMakeLists.txt
--- a/libdiscover/backends/CMakeLists.txt
+++ b/libdiscover/backends/CMakeLists.txt
@@ -31,7 +31,7 @@
 find_package(Snapd)
 set_package_properties(Snapd PROPERTIES
     DESCRIPTION "Library that exposes Snapd"
-    URL "http://www.snapcraft.io"
+    URL "https://www.snapcraft.io"
     PURPOSE "Required to build the Snap backend"
     TYPE OPTIONAL)
 
diff --git a/libdiscover/backends/DummyBackend/DummyResource.cpp b/libdiscover/backends/DummyBackend/DummyResource.cpp
--- a/libdiscover/backends/DummyBackend/DummyResource.cpp
+++ b/libdiscover/backends/DummyBackend/DummyResource.cpp
@@ -37,7 +37,7 @@
 {
     const int nofScreenshots = KRandom::random() % 5;
     m_screenshots = QList<QUrl>{
-        QUrl(QStringLiteral("http://screenshots.debian.net/screenshots/000/014/863/large.png")),
+        QUrl(QStringLiteral("https://screenshots.debian.net/screenshots/000/014/863/large.png")),
         QUrl(QStringLiteral("https://c2.staticflickr.com/6/5656/21772158034_dc84382527_o.jpg")),
         QUrl(QStringLiteral("https://c1.staticflickr.com/9/8479/8166397343_b78106f353_k.jpg")),
         QUrl(QStringLiteral("https://c2.staticflickr.com/4/3685/9954407993_dad10a6943_k.jpg")),
@@ -73,7 +73,7 @@
 
 QUrl DummyResource::homepage()
 {
-    return QUrl(QStringLiteral("http://kde.org"));
+    return QUrl(QStringLiteral("https://kde.org"));
 }
 
 QUrl DummyResource::helpURL()
diff --git a/libdiscover/backends/KNSBackend/custom/discover_ktexteditor_codesnippets_core.knsrc b/libdiscover/backends/KNSBackend/custom/discover_ktexteditor_codesnippets_core.knsrc
--- a/libdiscover/backends/KNSBackend/custom/discover_ktexteditor_codesnippets_core.knsrc
+++ b/libdiscover/backends/KNSBackend/custom/discover_ktexteditor_codesnippets_core.knsrc
@@ -37,7 +37,7 @@
 Name[zh_TW]=Kate 片段
 
 #ProvidersUrl=http://.../provider.xml
-ProvidersUrl=http://download.kde.org/ocs/providers.xml
+ProvidersUrl=https://download.kde.org/ocs/providers.xml
 Categories=KTextEditor Snippet
 UploadCategories=KTextEditor Snippet