diff --git a/config-templates/config.php b/config-templates/config.php
index dc4280072051d418426572b56fa9d93766143ec7..bc7fc589f8ebe30fd4c7835f92593046771d6d2d 100644
--- a/config-templates/config.php
+++ b/config-templates/config.php
@@ -460,6 +460,8 @@ $config = [
* Which functionality in SimpleSAMLphp do you want to enable. Normally you would enable only
* one of the functionalities below, but in some cases you could run multiple functionalities.
* In example when you are setting up a federation bridge.
+ *
+ * Note that shib13-idp has been deprecated and will be removed in SimpleSAMLphp 2.0.
*/
'enable.saml20-idp' => false,
'enable.shib13-idp' => false,
diff --git a/docs/simplesamlphp-changelog.md b/docs/simplesamlphp-changelog.md
index a8cd1396ca0325ccf8a7ad255300c59fed2cf1f3..1d59a97885f7304567c771231bcf5776db856f90 100644
--- a/docs/simplesamlphp-changelog.md
+++ b/docs/simplesamlphp-changelog.md
@@ -12,6 +12,7 @@ Released TBD
* This version will be the last of the 1.x branch and will provide a migration path to our new
templating system, routing system, translation system and hooks.
+ * SAML 1 / Shib 1.3 support is now marked deprecated and will be removed in SimpleSAMLphp 2.0.
## Version 1.18.4
diff --git a/docs/simplesamlphp-reference-idp-hosted.md b/docs/simplesamlphp-reference-idp-hosted.md
index 3a6b47934b868487996c680f56b6ff66b96d0ffd..03acd590f45b55210dcd07c95d8f05e5cb744dec 100644
--- a/docs/simplesamlphp-reference-idp-hosted.md
+++ b/docs/simplesamlphp-reference-idp-hosted.md
@@ -399,6 +399,8 @@ messages from that SP.
Shibboleth 1.3 options
----------------------
+Note that Shibboleth 1.3 support is deprecated and will be removed in the next major release of SimpleSAMLphp.
+
The following options for Shibboleth 1.3 IdP's are avaiblable:
`scopedattributes`
diff --git a/docs/simplesamlphp-reference-idp-remote.md b/docs/simplesamlphp-reference-idp-remote.md
index 95b4eda3e9d0b049267cf551a5d9b04f32986a60..db15941e9688db0f75dd129b176aef3aeb2aa285 100644
--- a/docs/simplesamlphp-reference-idp-remote.md
+++ b/docs/simplesamlphp-reference-idp-remote.md
@@ -248,6 +248,8 @@ SimpleSAMLphp only signs authentication responses by default. Signing of authent
Shibboleth 1.3 options
----------------------
+Note that Shibboleth 1.3 support is deprecated and will be removed in the next major release of SimpleSAMLphp.
+
`caFile`
: Alternative to specifying a certificate. Allows you to specify a file with root certificates, and responses from the service be validated against these certificates. Note that SimpleSAMLphp doesn't support chains with any itermediate certificates between the root and the certificate used to sign the response. Support for PKIX in SimpleSAMLphp is experimental, and we encourage users to not rely on PKIX for validation of signatures; for background information review [the SAML 2.0 Metadata Interoperability Profile](http://docs.oasis-open.org/security/saml/Post2.0/sstc-metadata-iop-cd-01.pdf).
diff --git a/docs/simplesamlphp-reference-sp-remote.md b/docs/simplesamlphp-reference-sp-remote.md
index 423df7b37f76366b4aa64cae63ba016b75b509e8..485d996bfca8c024ee0c36e448f4fe2496570a86 100644
--- a/docs/simplesamlphp-reference-sp-remote.md
+++ b/docs/simplesamlphp-reference-sp-remote.md
@@ -383,6 +383,8 @@ idp is in the intersection the discoveryservice will go directly to the idp.
Shibboleth 1.3 options
----------------------
+Note that Shibboleth 1.3 support is deprecated and will be removed in the next major release of SimpleSAMLphp.
+
The following options for Shibboleth 1.3 SP's are avaiblable:
`audience`
diff --git a/docs/simplesamlphp-upgrade-notes-1.19.md b/docs/simplesamlphp-upgrade-notes-1.19.md
index 5e039e97425c0b960fc1c7880fef4d83299303d5..8978f30e91c0e5be83eb3fbcaddad39333ea844a 100644
--- a/docs/simplesamlphp-upgrade-notes-1.19.md
+++ b/docs/simplesamlphp-upgrade-notes-1.19.md
@@ -2,3 +2,6 @@ Upgrade notes for SimpleSAMLphp 1.19
====================================
The minimum PHP version required is now PHP 7.0.
+
+SAML 1 / Shib 1.3 support is now deprecated and will start logging notices
+when used. It will be removed in SimpleSAMLphp 2.0.
diff --git a/metadata-templates/shib13-idp-hosted.php b/metadata-templates/shib13-idp-hosted.php
index dc6c9e0a9516b5eb756b2a4960b6a16fdab15df8..3af97d688bfc2cb80fb318dc9a937330c6f4576d 100644
--- a/metadata-templates/shib13-idp-hosted.php
+++ b/metadata-templates/shib13-idp-hosted.php
@@ -3,6 +3,8 @@
/**
* SAML 1.1 IdP configuration for SimpleSAMLphp.
*
+ * Note that SAML 1.1 support has been deprecated and will be removed in SimpleSAMLphp 2.0.
+ *
* See: https://simplesamlphp.org/docs/stable/simplesamlphp-reference-idp-hosted
*/
diff --git a/metadata-templates/shib13-idp-remote.php b/metadata-templates/shib13-idp-remote.php
index 9aa6f0e647b7dbe9a6c008b8f08f855bfc2d000e..d2eed7ab73ed2a2b3e5f2e9601092c7e69786115 100644
--- a/metadata-templates/shib13-idp-remote.php
+++ b/metadata-templates/shib13-idp-remote.php
@@ -3,6 +3,8 @@
/**
* SAML 1.1 remote IdP metadata for SimpleSAMLphp.
*
+ * Note that SAML 1.1 support has been deprecated and will be removed in SimpleSAMLphp 2.0.
+ *
* Remember to remove the IdPs you don't use from this file.
*
* See: https://simplesamlphp.org/docs/stable/simplesamlphp-reference-idp-remote
diff --git a/metadata-templates/shib13-sp-hosted.php b/metadata-templates/shib13-sp-hosted.php
index 15a275a3837e0670afe7954712deebfc5ada0b71..5cb8dc2de6bbcdebad1dc96638bb0b67debc057d 100644
--- a/metadata-templates/shib13-sp-hosted.php
+++ b/metadata-templates/shib13-sp-hosted.php
@@ -3,6 +3,8 @@
/**
* SAML 1.1 SP configuration for SimpleSAMLphp.
*
+ * Note that SAML 1.1 support has been deprecated and will be removed in SimpleSAMLphp 2.0.
+ *
* See: https://simplesamlphp.org/docs/stable/saml:sp
*/
diff --git a/metadata-templates/shib13-sp-remote.php b/metadata-templates/shib13-sp-remote.php
index b2fb1d8e0a07cb2c7c8733b5e3c16b13e019c458..f686733c466eec67c28360c7f10ec41c48894c93 100644
--- a/metadata-templates/shib13-sp-remote.php
+++ b/metadata-templates/shib13-sp-remote.php
@@ -3,6 +3,8 @@
/**
* SAML 1.1 remote SP metadata for SimpleSAMLphp.
*
+ * Note that SAML 1.1 support has been deprecated and will be removed in SimpleSAMLphp 2.0.
+ *
* See: https://simplesamlphp.org/docs/stable/simplesamlphp-reference-sp-remote
*/
diff --git a/modules/saml/www/sp/saml1-acs.php b/modules/saml/www/sp/saml1-acs.php
index 6b981774ce113d96c7e72748fab7c3c4874f5a83..cd114709353436a0644028b5acd08c03be865363 100644
--- a/modules/saml/www/sp/saml1-acs.php
+++ b/modules/saml/www/sp/saml1-acs.php
@@ -25,6 +25,7 @@ $sourceId = substr($sourceId, 1, $end - 1);
$source = \SimpleSAML\Auth\Source::getById($sourceId, '\SimpleSAML\Module\saml\Auth\Source\SP');
SimpleSAML\Logger::debug('Received SAML1 response');
+SimpleSAML\Logger::notice('SAML1 support is deprecated and will be removed in SimpleSAMLphp 2.0');
$target = (string) $_REQUEST['TARGET'];
diff --git a/www/shib13/idp/SSOService.php b/www/shib13/idp/SSOService.php
index 14a014fcdb8e8e56b948534494fdea47c34ade5e..1bc2ff7cafc8f40d940635f11e6337fede0b9ec1 100644
--- a/www/shib13/idp/SSOService.php
+++ b/www/shib13/idp/SSOService.php
@@ -12,6 +12,7 @@
require_once '../../_include.php';
\SimpleSAML\Logger::info('Shib1.3 - IdP.SSOService: Accessing Shibboleth 1.3 IdP endpoint SSOService');
+\SimpleSAML\Logger::notice('SAML1 support is deprecated and will be removed in SimpleSAMLphp 2.0');
$metadata = \SimpleSAML\Metadata\MetaDataStorageHandler::getMetadataHandler();
$idpEntityId = $metadata->getMetaDataCurrentEntityID('shib13-idp-hosted');