diff --git a/config.yaml b/config.yaml
index 776c501..6880589 100644
--- a/config.yaml
+++ b/config.yaml
@@ -38,11 +38,7 @@ sync:
     destination: ghcr.io/geonet/base-images/python:3.12.2-alpine3.19
   - source: docker.io/library/python:3.11.4-alpine3.18@sha256:995c7fcdf9a10e0e1a4555861dac63436b456822a167f07b6599d4f105de6fa0
     destination: ghcr.io/geonet/base-images/python:3.11.4-alpine3.18
-  - source: docker.io/library/golang:1.16-alpine3.15@sha256:5616dca835fa90ef13a843824ba58394dad356b7d56198fb7c93cbe76d7d67fe
-    destination: ghcr.io/geonet/base-images/go:1.16 # until ko has been fully adopted and Go 1.16 => 1.20/1.21
-  - source: docker.io/golang:1.20.8-alpine3.18@sha256:c63dbdb3cca37abbee4c50f61e34b1d043c2669d03f34485f9ee6fe5feed4e48
-    destination: ghcr.io/geonet/base-images/go:1.20 # until ko has been fully adopted
-  - source: docker.io/golang:1.21.1-alpine3.18@sha256:1c9cc949513477766da12bfa80541c4f24957323b0ee00630a6ff4ccf334b75b
+  - source: docker.io/golang:1.21.8-alpine3.18@sha256:860939eeb59ad790aa592fdd6d09829845b4e04ee5a59e4b77d5bbca41d949c7
     destination: ghcr.io/geonet/base-images/go:1.21 # until ko has been fully adopted
   - source: cgr.dev/chainguard/static:latest@sha256:da9822ad6f973e40e24e75133b08ae874900766873ecd03e58f7f630ccea898c
     sourceSignature:
diff --git a/go.mod b/go.mod
index e36e306..d1620eb 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/GeoNet/base-images
 
-go 1.20
+go 1.21