--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -9653,24 +9653,24 @@
     "expires_in_version": "never",
     "alert_emails": ["gfx-telemetry-alerts@mozilla.com","msreckovic@mozilla.com"],
     "kind": "enumerated",
     "n_values": 20,
     "releaseChannelCollection": "opt-out",
     "description": "Reports results from the graphics sanity test to track which drivers are having problems (0=TEST_PASSED, 1=TEST_FAILED_RENDER, 2=TEST_FAILED_VIDEO, 3=TEST_CRASHED)"
   },
   "READER_MODE_PARSE_RESULT" : {
-    "expires_in_version": "54",
+    "expires_in_version": "58",
     "alert_emails": ["firefox-dev@mozilla.org", "gijs@mozilla.com"],
     "kind": "enumerated",
     "n_values": 5,
     "description": "The result of trying to parse a document to show in reader view (0=Success, 1=Error too many elements, 2=Error in worker, 3=Error no article)"
   },
   "READER_MODE_DOWNLOAD_RESULT" : {
-    "expires_in_version": "54",
+    "expires_in_version": "58",
     "alert_emails": ["firefox-dev@mozilla.org", "gijs@mozilla.com"],
     "kind": "enumerated",
     "n_values": 5,
     "description": "The result of trying to download a document to show in reader view (0=Success, 1=Error XHR, 2=Error no document)"
   },
   "FENNEC_LOAD_SAVED_PAGE": {
     "expires_in_version": "60",
     "alert_emails": ["mobile-frontend@mozilla.com"],