diff --git a/.github/workflows/gitleaks.yml b/.github/workflows/gitleaks.yml
deleted file mode 100644
index d654128..0000000
--- a/.github/workflows/gitleaks.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-name: gitleaks
-
-on: [push, pull_request]
-
-jobs:
-  gitleaks:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - name: gitleaks-action
-        uses: zricethezav/gitleaks-action@master
-        with:
-          config-path: .gitleaks.toml
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 604ba4d..6d9c5b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ and this project adheres to
 
 ## [Unreleased]
 
+- fix tenable_asset `firstSeen` and `lastSeen` properties to be human-readable
+
 ## [8.5.0] 2022-06-08
 
 - move @jupiterone/tenable-client-nodejs to this repo
diff --git a/src/steps/vulnerabilities/converters.ts b/src/steps/vulnerabilities/converters.ts
index e671c00..a4e9e19 100644
--- a/src/steps/vulnerabilities/converters.ts
+++ b/src/steps/vulnerabilities/converters.ts
@@ -51,6 +51,7 @@ export function createAssetEntity(
   } catch (err) {
     logger.warn({ err }, 'Encountered error when checking entity size');
   }
+
   return createIntegrationEntity({
     entityData: {
       source: data,
@@ -72,8 +73,8 @@ export function createAssetEntity(
         terminatedBy: data.terminated_by,
         updatedAt: parseTimePropertyValue(data.updated_at),
         deletedAt: parseTimePropertyValue(data.deleted_at),
-        firstSeen: parseTimePropertyValue(data.first_seen),
-        lastSeen: parseTimePropertyValue(data.last_seen),
+        firstSeenOn: parseTimePropertyValue(data.first_seen),
+        lastSeenOn: parseTimePropertyValue(data.last_seen),
         firstScanTime: parseTimePropertyValue(data.first_scan_time),
         lastScanTime: parseTimePropertyValue(data.last_scan_time),
         lastAuthenticatedScanDate: parseTimePropertyValue(