diff --git a/releases/mastodon.json b/releases/mastodon.json
new file mode 100644
index 00000000..ad6bd616
--- /dev/null
+++ b/releases/mastodon.json
@@ -0,0 +1,102 @@
+{
+  "1.0": "2017-02-05",
+  "1.1": "2017-04-07",
+  "1.1.1": "2017-04-09",
+  "1.1.2": "2017-04-13",
+  "1.2": "2017-04-16",
+  "1.2.1": "2017-04-19",
+  "1.2.2": "2017-04-19",
+  "1.3": "2017-04-27",
+  "1.3.1": "2017-04-27",
+  "1.3.2": "2017-04-29",
+  "1.3.3": "2017-05-06",
+  "1.4.1": "2017-05-28",
+  "1.4.2": "2017-06-14",
+  "1.4.3": "2017-06-15",
+  "1.4.4": "2017-06-21",
+  "1.4.5": "2017-06-22",
+  "1.4.6": "2017-06-23",
+  "1.4.7": "2017-07-01",
+  "1.5.0": "2017-08-01",
+  "1.5.1": "2017-08-06",
+  "1.6.0": "2017-09-10",
+  "1.6.1": "2017-09-17",
+  "2.0.0": "2017-10-18",
+  "2.1.0": "2017-12-15",
+  "2.1.1": "2018-01-04",
+  "2.1.2": "2018-01-05",
+  "2.1.3": "2018-01-09",
+  "2.2.0": "2018-01-29",
+  "2.3.0": "2018-03-09",
+  "2.3.1": "2018-03-13",
+  "2.3.2": "2018-03-22",
+  "2.3.3": "2018-03-27",
+  "2.4.0": "2018-05-22",
+  "2.4.1": "2018-06-10",
+  "2.4.2": "2018-06-19",
+  "2.4.3": "2018-07-11",
+  "2.4.4": "2018-08-22",
+  "2.4.5": "2018-08-24",
+  "2.5.0": "2018-09-03",
+  "2.5.1": "2018-10-07",
+  "2.5.2": "2018-10-12",
+  "2.6.0": "2018-10-30",
+  "2.6.1": "2018-10-31",
+  "2.6.2": "2018-11-23",
+  "2.6.3": "2018-11-30",
+  "2.6.4": "2018-11-30",
+  "2.6.5": "2018-12-02",
+  "2.7.0": "2019-01-20",
+  "2.7.1": "2019-01-28",
+  "2.7.2": "2019-02-17",
+  "2.7.3": "2019-02-23",
+  "2.7.4": "2019-03-05",
+  "2.8.0": "2019-04-10",
+  "2.8.1": "2019-05-04",
+  "2.8.2": "2019-05-05",
+  "2.8.3": "2019-05-19",
+  "2.8.4": "2019-05-24",
+  "2.9.0": "2019-06-13",
+  "2.9.1": "2019-06-22",
+  "2.9.2": "2019-06-22",
+  "2.9.3": "2019-08-10",
+  "2.9.4": "2020-02-27",
+  "3.0.0": "2019-10-03",
+  "3.0.1": "2019-10-10",
+  "3.0.2": "2020-02-27",
+  "3.1.0": "2020-02-09",
+  "3.1.1": "2020-02-10",
+  "3.1.2": "2020-02-27",
+  "3.1.3": "2020-04-05",
+  "3.1.4": "2020-05-14",
+  "3.1.5": "2020-07-07",
+  "3.2.0": "2020-07-27",
+  "3.2.1": "2020-10-19",
+  "3.2.2": "2020-12-19",
+  "3.3.0": "2020-12-27",
+  "3.3.1": "2022-01-31",
+  "3.3.2": "2022-02-02",
+  "3.3.3": "2022-03-30",
+  "3.4.0": "2021-05-16",
+  "3.4.1": "2021-06-03",
+  "3.4.10": "2022-11-14",
+  "3.4.2": "2021-11-06",
+  "3.4.3": "2021-11-06",
+  "3.4.4": "2021-11-26",
+  "3.4.5": "2022-01-31",
+  "3.4.6": "2022-02-03",
+  "3.4.7": "2022-03-30",
+  "3.4.8": "2022-05-26",
+  "3.4.9": "2022-11-14",
+  "3.5.0": "2022-03-30",
+  "3.5.1": "2022-04-08",
+  "3.5.2": "2022-05-04",
+  "3.5.3": "2022-05-26",
+  "3.5.4": "2022-11-14",
+  "3.5.5": "2022-11-14",
+  "3.5.6": "2023-02-10",
+  "4.0.0": "2022-11-14",
+  "4.0.1": "2022-11-14",
+  "4.0.2": "2022-11-15",
+  "4.1.0": "2023-02-10"
+}
\ No newline at end of file