diff --git a/.circleci/config.yml b/.circleci/config.yml
index ca127f6a8..f79257e22 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -75,7 +75,7 @@ jobs:
   build:
     working_directory: /home/circleci/go/src/github.com/grafana/carbon-relay-ng
     docker:
-      - image: cimg/go:1.20.3
+      - image: cimg/go:1.20.4
     steps:
       - checkout
       - run: go install github.com/go-bindata/go-bindata/...@latest
@@ -166,7 +166,7 @@ jobs:
 
   github_binaries:
       docker:
-        - image: cimg/go:1.20.3
+        - image: cimg/go:1.20.4
       steps:
         - checkout
         - run: curl -sfL https://goreleaser.com/static/run | bash
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb742616c..9aad72c1b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 # unreleased
+
+# v1.4.3: May 5, 2023
+* Bump go mod version to 1.20 and update go images used to build carbon-relay-ng to 1.20.4 #518
+
 # v1.4.2: April 19, 2023
 * Update go images used to build carbon-relay-ng to 1.20.3 #517
 
diff --git a/go-whisper/whisper.go b/go-whisper/whisper.go
index 615bfb8fd..60195cc5c 100644
--- a/go-whisper/whisper.go
+++ b/go-whisper/whisper.go
@@ -59,13 +59,13 @@ func parseRetentionPart(retentionPart string) (int, error) {
 }
 
 /*
-  Parse a retention definition as you would find in the storage-schemas.conf of a Carbon install.
-  Note that this only parses a single retention definition, if you have multiple definitions (separated by a comma)
-  you will have to split them yourself.
+Parse a retention definition as you would find in the storage-schemas.conf of a Carbon install.
+Note that this only parses a single retention definition, if you have multiple definitions (separated by a comma)
+you will have to split them yourself.
 
-  ParseRetentionDef("10s:14d") Retention{10, 120960}
+ParseRetentionDef("10s:14d") Retention{10, 120960}
 
-  See: http://graphite.readthedocs.org/en/1.0/config-carbon.html#storage-schemas-conf
+See: http://graphite.readthedocs.org/en/1.0/config-carbon.html#storage-schemas-conf
 */
 func ParseRetentionDef(retentionDef string) (*Retention, error) {
 	parts := strings.Split(retentionDef, ":")
@@ -128,10 +128,10 @@ func validateRetentions(retentions Retentions) error {
 }
 
 /*
-  A retention level.
+A retention level.
 
-  Retention levels describe a given archive in the database. How detailed it is and how far back
-  it records.
+Retention levels describe a given archive in the database. How detailed it is and how far back
+it records.
 */
 type Retention struct {
 	secondsPerPoint int
@@ -178,8 +178,8 @@ func (r retentionsByPrecision) Less(i, j int) bool {
 }
 
 /*
-   Implementation of modulo that works like Python
-   Thanks @timmow for this
+Implementation of modulo that works like Python
+Thanks @timmow for this
 */
 func mod(a, b int) int {
 	return a - (b * int(math.Floor(float64(a)/float64(b))))
diff --git a/go.mod b/go.mod
index 59c040bc7..a43b7925d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/grafana/carbon-relay-ng
 
-go 1.18
+go 1.20
 
 require (
 	cloud.google.com/go v0.18.1-0.20180119164648-b1067c1d21b5