diff --git a/.github/workflows/check_formatting.yml b/.github/workflows/check_formatting.yml
index 7233082da38..3f2334dd4bb 100644
--- a/.github/workflows/check_formatting.yml
+++ b/.github/workflows/check_formatting.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/check_make_parser.yml b/.github/workflows/check_make_parser.yml
index 4f89fe56c9c..805cf2fe494 100644
--- a/.github/workflows/check_make_parser.yml
+++ b/.github/workflows/check_make_parser.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/check_make_visitor.yml b/.github/workflows/check_make_visitor.yml
index 68d8660ba84..219e1ece2dc 100644
--- a/.github/workflows/check_make_visitor.yml
+++ b/.github/workflows/check_make_visitor.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/cluster_endtoend.yml b/.github/workflows/cluster_endtoend.yml
index c188cf15f4f..60edd6e3405 100644
--- a/.github/workflows/cluster_endtoend.yml
+++ b/.github/workflows/cluster_endtoend.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/cluster_initial_sharding_multi.yml b/.github/workflows/cluster_initial_sharding_multi.yml
index e2f5cf03bf5..20b4354bede 100644
--- a/.github/workflows/cluster_initial_sharding_multi.yml
+++ b/.github/workflows/cluster_initial_sharding_multi.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/create_release.yml b/.github/workflows/create_release.yml
index 1f8bb410199..85a4d098d5c 100644
--- a/.github/workflows/create_release.yml
+++ b/.github/workflows/create_release.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/docker_test_1.yml b/.github/workflows/docker_test_1.yml
index f15e3a3f9bd..0c2c621df32 100644
--- a/.github/workflows/docker_test_1.yml
+++ b/.github/workflows/docker_test_1.yml
@@ -11,7 +11,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/e2e_race.yml b/.github/workflows/e2e_race.yml
index 5484bf81372..fb1b2ca2d8a 100644
--- a/.github/workflows/e2e_race.yml
+++ b/.github/workflows/e2e_race.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+      go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/endtoend.yml b/.github/workflows/endtoend.yml
index 5e039acfda2..026e8f1f4ef 100644
--- a/.github/workflows/endtoend.yml
+++ b/.github/workflows/endtoend.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/golangci-linter.yml b/.github/workflows/golangci-linter.yml
index 0862c6fed3e..2c68ac6bf9b 100644
--- a/.github/workflows/golangci-linter.yml
+++ b/.github/workflows/golangci-linter.yml
@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/.github/workflows/legacy_local_example.yml b/.github/workflows/legacy_local_example.yml
index 5780f90ce52..2033da389af 100644
--- a/.github/workflows/legacy_local_example.yml
+++ b/.github/workflows/legacy_local_example.yml
@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/local_example.yml b/.github/workflows/local_example.yml
index 47d3c8c29aa..acddcc357fa 100644
--- a/.github/workflows/local_example.yml
+++ b/.github/workflows/local_example.yml
@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/region_example.yml b/.github/workflows/region_example.yml
index bc74a0b13fb..b31b9af6151 100644
--- a/.github/workflows/region_example.yml
+++ b/.github/workflows/region_example.yml
@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/sonar_analysis.yml b/.github/workflows/sonar_analysis.yml
index 3381d93b223..9cb84dd6ae9 100644
--- a/.github/workflows/sonar_analysis.yml
+++ b/.github/workflows/sonar_analysis.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v1
         with:
-          go-version: 1.13
+          go-version: 1.15
 
       - name: Check out code
         uses: actions/checkout@v2
diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 5929e7f3366..ba58c5af400 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/.github/workflows/unit_race.yml b/.github/workflows/unit_race.yml
index 09f1d996f5d..7e71449de83 100644
--- a/.github/workflows/unit_race.yml
+++ b/.github/workflows/unit_race.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
 
     - name: Check out code
       uses: actions/checkout@v2
diff --git a/build.env b/build.env
index c16ec1e2da8..3bc3ab6a4a9 100755
--- a/build.env
+++ b/build.env
@@ -17,7 +17,7 @@
 source ./tools/shell_functions.inc
 
 go version >/dev/null 2>&1 || fail "Go is not installed or is not in \$PATH. See https://vitess.io/contributing/build-from-source for install instructions."
-goversion_min 1.13 || fail "Go version reported: `go version`. Version 1.13+ required. See https://vitess.io/contributing/build-from-source for install instructions."
+goversion_min 1.15 || fail "Go version reported: `go version`. Version 1.15+ required. See https://vitess.io/contributing/build-from-source for install instructions."
 
 mkdir -p dist
 mkdir -p bin
diff --git a/docker/bootstrap/Dockerfile.common b/docker/bootstrap/Dockerfile.common
index 54402e358ef..0fcf363fdc3 100644
--- a/docker/bootstrap/Dockerfile.common
+++ b/docker/bootstrap/Dockerfile.common
@@ -1,4 +1,4 @@
-FROM golang:1.13-buster
+FROM golang:1.15-buster
 
 # Install Vitess build dependencies
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
diff --git a/go.mod b/go.mod
index 8f820011419..a5a334b8de1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module vitess.io/vitess
 
-go 1.13
+go 1.15
 
 require (
 	cloud.google.com/go v0.45.1
diff --git a/go/netutil/netutil_test.go b/go/netutil/netutil_test.go
index 193237bec56..bd75f3e2ccc 100644
--- a/go/netutil/netutil_test.go
+++ b/go/netutil/netutil_test.go
@@ -17,6 +17,7 @@ limitations under the License.
 package netutil
 
 import (
+	"fmt"
 	"math/rand"
 	"net"
 	"reflect"
@@ -56,7 +57,7 @@ func testUniformity(t *testing.T, size int, margin float64) {
 	rand.Seed(1)
 	data := make([]*net.SRV, size)
 	for i := 0; i < size; i++ {
-		data[i] = &net.SRV{Target: string('a' + i), Weight: 1}
+		data[i] = &net.SRV{Target: fmt.Sprint('a' + i), Weight: 1}
 	}
 	checkDistribution(t, data, margin)
 }
diff --git a/go/trace/fake.go b/go/trace/fake.go
index 26821b96183..53f0a3a7fc9 100644
--- a/go/trace/fake.go
+++ b/go/trace/fake.go
@@ -25,8 +25,10 @@ import (
 
 type noopTracingServer struct{}
 
-func (noopTracingServer) New(Span, string) Span                                     { return NoopSpan{} }
-func (noopTracingServer) NewClientSpan(parent Span, serviceName, label string) Span { return NoopSpan{} }
+func (noopTracingServer) New(Span, string) Span { return NoopSpan{} }
+func (noopTracingServer) NewClientSpan(parent Span, serviceName, label string) Span {
+	return NoopSpan{}
+}
 func (noopTracingServer) FromContext(context.Context) (Span, bool)                  { return nil, false }
 func (noopTracingServer) NewFromString(parent, label string) (Span, error)          { return NoopSpan{}, nil }
 func (noopTracingServer) NewContext(parent context.Context, _ Span) context.Context { return parent }
diff --git a/go/vt/topo/k8stopo/version.go b/go/vt/topo/k8stopo/version.go
index 9f8eeb79915..c7e16bfffeb 100644
--- a/go/vt/topo/k8stopo/version.go
+++ b/go/vt/topo/k8stopo/version.go
@@ -17,6 +17,8 @@ limitations under the License.
 package k8stopo
 
 import (
+	"fmt"
+
 	"vitess.io/vitess/go/vt/topo"
 )
 
@@ -36,5 +38,5 @@ func VersionFromInt(version int64) topo.Version {
 	if version == -1 {
 		return nil
 	}
-	return KubernetesVersion(version)
+	return KubernetesVersion(fmt.Sprint(version))
 }