diff --git a/pkg/r10e-docker/nixpkgs_go_versions.go b/pkg/r10e-docker/nixpkgs_go_versions.go
index 89053d4..4cefb74 100644
--- a/pkg/r10e-docker/nixpkgs_go_versions.go
+++ b/pkg/r10e-docker/nixpkgs_go_versions.go
@@ -15,6 +15,7 @@ var NixpkgsCommitForGoVersion = map[string][3]string{
 	"1.23": {"1_23", "f0eaec3bf29b96bf6f801cc602ed6827a9fa53ec", "2024-08-27"},
 	"1.24": {"1_24", "2a875b68adee59464634ce6e3240f95f990091e5", "2025-04-22"},
 	"1.25": {"1_25", "e84ec1a23cdb2494ca871eebc0edf34a00c351da", "2025-09-07"},
+	"1.26": {"1_26", "d233902339c02a9c334e7e593de68855ad26c4cb", "2026-05-15"},
 }
 
-var DefaultGoVersion = "1.25"
+var DefaultGoVersion = "1.26"
diff --git a/scripts/test_configs.sh b/scripts/test_configs.sh
index 69fff3e..a9ec70c 100755
--- a/scripts/test_configs.sh
+++ b/scripts/test_configs.sh
@@ -33,7 +33,7 @@ make clean && \
   make r10e-build config_file="${PROJECT_DIR}/testdata/config3_include-ca-bundle-false.json" project_name="${PROJECT_NAME}"
 
 # Test go_version
-supported_go_versions=("1.21" "1.22" "1.23" "1.24" "1.25")
+supported_go_versions=("1.21" "1.22" "1.23" "1.24" "1.25" "1.26")
 for go_version in "${supported_go_versions[@]}"; do
     make clean && \
     rm -rf r10e-docker && \