diff --git a/resources/profiles/BIBO.ini b/resources/profiles/BIBO.ini
index 07d871823..59a8bbc74 100644
--- a/resources/profiles/BIBO.ini
+++ b/resources/profiles/BIBO.ini
@@ -7,7 +7,7 @@ name = BIBO
 # This means, the server may force the PrusaSlicer configuration to be downgraded.
 config_version = 0.0.2
 # Where to get the updates from?
-config_update_url = http://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/BIBO/
+config_update_url = https://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/BIBO/
 
 # The printer models will be shown by the Configuration Wizard in this order,
 # also the first model installed & the first nozzle installed will be activated after install.
diff --git a/resources/profiles/Creality.ini b/resources/profiles/Creality.ini
index 8d15c46cb..a51e1369e 100644
--- a/resources/profiles/Creality.ini
+++ b/resources/profiles/Creality.ini
@@ -7,8 +7,8 @@ name = Creality
 # This means, the server may force the PrusaSlicer configuration to be downgraded.
 config_version = 0.0.3
 # Where to get the updates from?
-config_update_url = http://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/Creality/
-# changelog_url = http://files.prusa3d.com/?latest=slicer-profiles&lng=%1%
+config_update_url = https://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/Creality/
+# changelog_url = https://files.prusa3d.com/?latest=slicer-profiles&lng=%1%
 
 # The printer models will be shown by the Configuration Wizard in this order,
 # also the first model installed & the first nozzle installed will be activated after install.
diff --git a/resources/profiles/LulzBot.ini b/resources/profiles/LulzBot.ini
index 53151d819..fdd673d25 100644
--- a/resources/profiles/LulzBot.ini
+++ b/resources/profiles/LulzBot.ini
@@ -4,7 +4,7 @@
 # Vendor name will be shown by the Config Wizard.
 name = LulzBot
 config_version = 0.0.1
-config_update_url = http://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/LulzBot/
+config_update_url = https://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/LulzBot/
 
 [printer_model:MINI_AERO]
 name = Mini Aero
diff --git a/resources/profiles/PrusaResearch.ini b/resources/profiles/PrusaResearch.ini
index cc22d5093..d279e7dda 100644
--- a/resources/profiles/PrusaResearch.ini
+++ b/resources/profiles/PrusaResearch.ini
@@ -7,8 +7,8 @@ name = Prusa Research
 # This means, the server may force the PrusaSlicer configuration to be downgraded.
 config_version = 1.1.2
 # Where to get the updates from?
-config_update_url = http://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/PrusaResearch/
-changelog_url = http://files.prusa3d.com/?latest=slicer-profiles&lng=%1%
+config_update_url = https://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/PrusaResearch/
+changelog_url = https://files.prusa3d.com/?latest=slicer-profiles&lng=%1%
 
 # The printer models will be shown by the Configuration Wizard in this order,
 # also the first model installed & the first nozzle installed will be activated after install.
diff --git a/src/slic3r/GUI/UpdateDialogs.cpp b/src/slic3r/GUI/UpdateDialogs.cpp
index b3b35d68d..97a3e3880 100644
--- a/src/slic3r/GUI/UpdateDialogs.cpp
+++ b/src/slic3r/GUI/UpdateDialogs.cpp
@@ -25,7 +25,7 @@ namespace Slic3r {
 namespace GUI {
 
 
-static const char* URL_CHANGELOG = "http://files.prusa3d.com/?latest=slicer-stable&lng=%1%";
+static const char* URL_CHANGELOG = "https://files.prusa3d.com/?latest=slicer-stable&lng=%1%";
 static const char* URL_DOWNLOAD = "https://www.prusa3d.com/downloads&lng=%1%";
 static const char* URL_DEV = "https://github.com/prusa3d/PrusaSlicer/releases/tag/version_%1%";
 
diff --git a/src/slic3r/Utils/PresetUpdater.cpp b/src/slic3r/Utils/PresetUpdater.cpp
index b424bafc4..e50bbb7fb 100644
--- a/src/slic3r/Utils/PresetUpdater.cpp
+++ b/src/slic3r/Utils/PresetUpdater.cpp
@@ -309,7 +309,7 @@ void PresetUpdater::priv::sync_config(const VendorMap vendors)
 		const std::string idx_path = (cache_path / (vendor.id + ".idx")).string();
 		const std::string idx_path_temp = idx_path + "-update";
 		//check if idx_url is leading to our site 
-		if (! boost::starts_with(idx_url, "http://files.prusa3d.com/wp-content/uploads/repository/"))
+		if (! boost::starts_with(idx_url, "https://files.prusa3d.com/wp-content/uploads/repository/"))
 		{
 			BOOST_LOG_TRIVIAL(warning) << "unsafe url path for vendor \"" << vendor.name << "\" rejected: " << idx_url;
 			continue;