diff --git a/changelog/@unreleased/pr-4421.v2.yml b/changelog/@unreleased/pr-4421.v2.yml
new file mode 100644
index 00000000000..6b59dfe2184
--- /dev/null
+++ b/changelog/@unreleased/pr-4421.v2.yml
@@ -0,0 +1,7 @@
+type: improvement
+improvement:
+  description: |-
+    HikariCP was upgraded 2.4.7 -> 3.4.1
+    There are minor API and metrics changes/breaks.
+  links:
+  - https://github.com/palantir/atlasdb/pull/4421
diff --git a/gradle/versions.gradle b/gradle/versions.gradle
index 52d044ae54d..fc77e5fc34a 100644
--- a/gradle/versions.gradle
+++ b/gradle/versions.gradle
@@ -27,7 +27,7 @@ ext.libVersions =
     libthrift: '0.9.2',
     protoc: '3.5.1',
     findbugs: '1.3.9',
-    hikariCP: '2.4.7',
+    hikariCP: '3.4.1',
     checkstyle: '6.18',
     findbugsAnnotations: '2.0.3',
     ant: '1.9.4',