diff --git a/.tool-versions b/.tool-versions
deleted file mode 100644
index f549b5d819..0000000000
--- a/.tool-versions
+++ /dev/null
@@ -1,3 +0,0 @@
-golang     1.26.1
-shfmt      3.8.0
-shellcheck 0.10.0
diff --git a/Dockerfile b/Dockerfile
index a3c6ff8fb7..7da0c2dd95 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 #
 # Nothing fancy here: we copy in the source code and build on the Alpine Go
 # image. Refer to .dockerignore to get a sense of what we're not going to copy.
-FROM golang:1.25.4-alpine3.22@sha256:d3f0cf7723f3429e3f9ed846243970b20a2de7bae6a5b66fc5914e228d831bbb AS builder
+FROM golang:1.26.3-alpine3.22@sha256:be93003ee861b3b91b6ebcb22678524947e0cd786c2df3f32af520006b1e54f5 AS builder
 
 COPY . /src
 WORKDIR /src
diff --git a/dev/vendor-lib.sh b/dev/vendor-lib.sh
index ef53800ab7..e4267183cb 100755
--- a/dev/vendor-lib.sh
+++ b/dev/vendor-lib.sh
@@ -128,7 +128,7 @@ echo "Creating go.mod file..."
 cat > "$DEST_LIB/go.mod" <<EOF
 module github.com/sourcegraph/sourcegraph/lib
 
-go 1.23
+go 1.26.3
 EOF
 
 # Create README.md
diff --git a/go.mod b/go.mod
index 5d4f6d2b08..dd31f33b0a 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/sourcegraph/src-cli
 
-go 1.26
+go 1.26.3
 
 require (
 	cloud.google.com/go/storage v1.50.0
diff --git a/lib/go.mod b/lib/go.mod
index 95f5d34705..323943b701 100644
--- a/lib/go.mod
+++ b/lib/go.mod
@@ -1,6 +1,6 @@
 module github.com/sourcegraph/sourcegraph/lib
 
-go 1.25.8
+go 1.26.3
 
 require (
 	github.com/Masterminds/semver v1.5.0
diff --git a/mise.toml b/mise.toml
index f788ae6e0a..8cc336f07b 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,4 +1,4 @@
 [tools]
-golang = "1.26.2"
+golang = "1.26.3"
 shfmt = "3.8.0"
 shellcheck = "0.10.0"