diff --git a/CHANGELOG b/CHANGELOG
index 8e3a862..9723731 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -4,7 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [3.12.0] - 2020-09-21
+### Added
+    - New API methods added:
+        - getGeocacheSizes
+        - getGeocacheStatuses
+        - getTrackableJourneys
+        - getOptedOutUsers
 
 ## [3.11.0] - 2020-05-22
 ### Added
diff --git a/composer.json b/composer.json
index c790ba7..9265a13 100644
--- a/composer.json
+++ b/composer.json
@@ -17,10 +17,10 @@
         }
     },
     "require": {
-        "php": "~7.3",
-        "monolog/monolog": "~2.0",
-        "guzzlehttp/guzzle": "~6.5",
-        "surfoo/oauth2-geocaching": "~1.3"
+        "php": "^7.3",
+        "monolog/monolog": "^2.0",
+        "guzzlehttp/guzzle": "^6.0 || ^7.0",
+        "surfoo/oauth2-geocaching": "^1.3"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.0",
diff --git a/src/Sdk/GeocachingSdk.php b/src/Sdk/GeocachingSdk.php
index a3e2059..3261343 100644
--- a/src/Sdk/GeocachingSdk.php
+++ b/src/Sdk/GeocachingSdk.php
@@ -734,6 +734,19 @@ public function getUserTrackables(array $query = [], array $options = [])
         return $this->httpClient->get('trackables', $query, $options);
     }
 
+    /**
+     * swagger: GET /v{api-version}/trackables/{referenceCode}/journeys 
+     *
+     * @see https://api.groundspeak.com/documentation#get-trackable-journeys
+     * @see https://api.groundspeak.com/api-docs/index#!/Trackables/Trackables_GetTrackableJourneys
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getTrackableJourneys(string $referenceCode, array $query = [], array $options = [])
+    {
+        return $this->httpClient->get('trackables/' . $referenceCode . '/journeys', $query, $options);
+    }
+
     /**
      * swagger: GET /v{api-version}/trackables/geocointypes
      *
@@ -959,6 +972,7 @@ public function getReferenceCodeFromId(array $query, array $options = [])
      * swagger: GET /v{api-version}/countries
      *
      * @see https://api.groundspeak.com/documentation#get-countries
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetCountries
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -971,6 +985,7 @@ public function getCountries(array $options = [])
      * swagger: GET /v{api-version}/states
      *
      * @see https://api.groundspeak.com/documentation#get-states
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetStates
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -983,6 +998,7 @@ public function getStates(array $options = [])
      * swagger: GET /v{api-version}/countries/{countryId}/states
      *
      * @see https://api.groundspeak.com/documentation#get-country-states
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetStatesByCountry
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -995,6 +1011,7 @@ public function getStatesByCountry(int $countryId, array $options = [])
      * swagger: GET /v{api-version}/membershiplevels
      *
      * @see https://api.groundspeak.com/documentation#get-membership-levels
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetMembershipLevels
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -1007,6 +1024,7 @@ public function getMembershipLevels(array $options = [])
      * swagger: GET /v{api-version}/geocachetypes
      *
      * @see https://api.groundspeak.com/documentation#get-geocache-types
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetGeocacheTypes
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -1019,6 +1037,7 @@ public function getGeocacheTypes(array $options = [])
      * swagger: GET /v{api-version}/attributes
      *
      * @see https://api.groundspeak.com/documentation#get-attributes
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetAttributes
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -1027,10 +1046,37 @@ public function getAttributes(array $options = [])
         return $this->httpClient->get('attributes', $options);
     }
 
+    /**
+     * swagger: GET /v{api-version}/geocachesizes 
+     *
+     * @see https://api.groundspeak.com/documentation#get-geocache-sizes
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetGeocacheSizes
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getGeocacheSizes(array $options = [])
+    {
+        return $this->httpClient->get('geocachesizes', $options);
+    }
+
+    /**
+     * swagger: GET /v{api-version}/geocachestatuses 
+     *
+     * @see https://api.groundspeak.com/documentation#get-geocache-statuses
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetGeocacheStatuses
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getGeocacheStatuses(array $options = [])
+    {
+        return $this->httpClient->get('geocachestatuses', $options);
+    }
+
     /**
      * swagger: GET /v{api-version}/geocachelogtypes
      *
      * @see https://api.groundspeak.com/documentation#get-geocachelog-types
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetGeocacheLogTypes
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -1043,6 +1089,7 @@ public function getGeocacheLogTypes(array $options = [])
      * swagger: GET /v{api-version}/trackablelogtypes
      *
      * @see https://api.groundspeak.com/documentation#get-trackablelog-types
+     * @see https://api.groundspeak.com/api-docs/index#!/ReferenceData/ReferenceData_GetTrackableLogTypes
      *
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */
@@ -1051,6 +1098,19 @@ public function getTrackableLogTypes(array $options = [])
         return $this->httpClient->get('trackablelogtypes', $options);
     }
 
+    /**
+     * swagger: GET /v{api-version}/optedoutusers
+     *
+     * @see https://api.groundspeak.com/documentation#get-opted-out-users
+     * @see https://api.groundspeak.com/api-docs/index#!/Users/Users_GetOptedOutUsers
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getOptedOutUsers(array $query, array $options = [])
+    {
+        return $this->httpClient->get('optedoutusers', $query, $options);
+    }
+
     /**
      * swagger: GET /status/ping
      *
diff --git a/src/Sdk/GeocachingSdkInterface.php b/src/Sdk/GeocachingSdkInterface.php
index 839e258..2749559 100644
--- a/src/Sdk/GeocachingSdkInterface.php
+++ b/src/Sdk/GeocachingSdkInterface.php
@@ -388,6 +388,13 @@ public function getTrackable(string $referenceCode, array $query = [], array $op
      */
     public function getUserTrackables(array $query = [], array $options = []);
 
+    /**
+     * @see https://api.groundspeak.com/documentation#get-trackable-journeys
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getTrackableJourneys(string $referenceCode, array $query = [], array $options = []);
+
     /**
      * @see https://api.groundspeak.com/documentation#get-geocoin-types
      *
@@ -549,6 +556,20 @@ public function getGeocacheTypes(array $options = []);
      */
     public function getAttributes(array $options = []);
 
+    /**
+     * @see https://api.groundspeak.com/documentation#get-geocache-sizes
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getGeocacheSizes(array $options = []);
+
+    /**
+     * @see https://api.groundspeak.com/documentation#get-geocache-statuses
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getGeocacheStatuses(array $options = []);
+
     /**
      * @see https://api.groundspeak.com/documentation#get-geocachelog-types
      *
@@ -563,6 +584,13 @@ public function getGeocacheLogTypes(array $options = []);
      */
     public function getTrackableLogTypes(array $options = []);
 
+    /**
+     * @see https://api.groundspeak.com/documentation#get-opted-out-users
+     *
+     * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
+     */
+    public function getOptedOutUsers(array $query, array $options = []);
+
     /**
      * @return \Geocaching\Lib\Adapters\GuzzleHttpClient
      */