diff --git a/Makefile b/Makefile
index ba4e9848823d..b5fb87d77dfd 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ SHELL:=/usr/bin/env bash
 #
 # Go.
 #
-GO_VERSION ?= 1.21.5
+GO_VERSION ?= 1.21.8
 GO_CONTAINER_IMAGE ?= docker.io/library/golang:$(GO_VERSION)
 
 # Use GOPROXY environment variable if set
diff --git a/Tiltfile b/Tiltfile
index cdeb1f94b3d9..b8a5b318b1a9 100644
--- a/Tiltfile
+++ b/Tiltfile
@@ -184,7 +184,7 @@ def load_provider_tiltfiles():
 
 tilt_helper_dockerfile_header = """
 # Tilt image
-FROM golang:1.21.5 as tilt-helper
+FROM golang:1.21.8 as tilt-helper
 # Install delve. Note this should be kept in step with the Go release minor version.
 RUN go install github.com/go-delve/delve/cmd/dlv@v1.21
 # Support live reloading with Tilt
@@ -195,7 +195,7 @@ RUN wget --output-document /restart.sh --quiet https://raw.githubusercontent.com
 """
 
 tilt_dockerfile_header = """
-FROM golang:1.21.5 as tilt
+FROM golang:1.21.8 as tilt
 WORKDIR /
 COPY --from=tilt-helper /process.txt .
 COPY --from=tilt-helper /start.sh .