diff --git a/.circleci/config.yml b/.circleci/config.yml
index 844ed294b..fb9159ff3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,14 +4,12 @@ defaults:
     working_directory: '/go/src/github.com/influxdata/telegraf'
     environment:
       GOFLAGS: -p=8
-  go-1_12: &go-1_12
-    docker:
-      - image: 'quay.io/influxdb/telegraf-ci:1.12.17'
-        environment:
-          GO111MODULE: 'on'
   go-1_13: &go-1_13
     docker:
-      - image: 'quay.io/influxdb/telegraf-ci:1.13.8'
+      - image: 'quay.io/influxdb/telegraf-ci:1.13.11'
+  go-1_14: &go-1_14
+    docker:
+      - image: 'quay.io/influxdb/telegraf-ci:1.14.3'
   mac: &mac
     macos:
       xcode: 11.3.1
@@ -23,7 +21,7 @@ defaults:
 version: 2
 jobs:
   deps:
-    <<: [ *defaults, *go-1_13 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - checkout
       - restore_cache:
@@ -64,22 +62,22 @@ jobs:
             - 'usr/local/bin/gofmt'
             - 'Users/distiller/go'
 
-  test-go-1.12:
-    <<: [ *defaults, *go-1_12 ]
+  test-go-1.13:
+    <<: [ *defaults, *go-1_13 ]
     steps:
       - attach_workspace:
           at: '/go'
       - run: 'make'
       - run: 'make test'
-  test-go-1.12-386:
-    <<: [ *defaults, *go-1_12 ]
+  test-go-1.13-386:
+    <<: [ *defaults, *go-1_13 ]
     steps:
       - attach_workspace:
           at: '/go'
       - run: 'GOARCH=386 make'
       - run: 'GOARCH=386 make test'
-  test-go-1.13:
-    <<: [ *defaults, *go-1_13 ]
+  test-go-1.14:
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
           at: '/go'
@@ -87,8 +85,8 @@ jobs:
       - run: 'make check'
       - run: 'make check-deps'
       - run: 'make test'
-  test-go-1.13-386:
-    <<: [ *defaults, *go-1_13 ]
+  test-go-1.14-386:
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
           at: '/go'
@@ -105,7 +103,7 @@ jobs:
       - run: 'make test'
 
   package:
-    <<: [ *defaults, *go-1_13 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
           at: '/go'
@@ -114,7 +112,7 @@ jobs:
           path: './build'
           destination: 'build'
   release:
-    <<: [ *defaults, *go-1_13 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
           at: '/go'
@@ -123,7 +121,7 @@ jobs:
           path: './build'
           destination: 'build'
   nightly:
-    <<: [ *defaults, *go-1_13 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
           at: '/go'
@@ -144,18 +142,6 @@ workflows:
           filters:
             tags:
               only: /.*/
-      - 'test-go-1.12':
-          requires:
-            - 'deps'
-          filters:
-            tags:
-              only: /.*/
-      - 'test-go-1.12-386':
-          requires:
-            - 'deps'
-          filters:
-            tags:
-              only: /.*/
       - 'test-go-1.13':
           requires:
             - 'deps'
@@ -168,6 +154,18 @@ workflows:
           filters:
             tags:
               only: /.*/
+      - 'test-go-1.14':
+          requires:
+            - 'deps'
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.14-386':
+          requires:
+            - 'deps'
+          filters:
+            tags:
+              only: /.*/
       - 'test-go-1.13-darwin':
           requires:
             - 'macdeps'
@@ -176,16 +174,16 @@ workflows:
               only: /.*/
       - 'package':
           requires:
-            - 'test-go-1.12'
-            - 'test-go-1.12-386'
             - 'test-go-1.13'
             - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
       - 'release':
           requires:
-            - 'test-go-1.12'
-            - 'test-go-1.12-386'
             - 'test-go-1.13'
             - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
           filters:
             tags:
               only: /.*/
@@ -194,24 +192,24 @@ workflows:
   nightly:
     jobs:
       - 'deps'
-      - 'test-go-1.12':
-          requires:
-            - 'deps'
-      - 'test-go-1.12-386':
-          requires:
-            - 'deps'
       - 'test-go-1.13':
           requires:
             - 'deps'
       - 'test-go-1.13-386':
           requires:
             - 'deps'
+      - 'test-go-1.14':
+          requires:
+            - 'deps'
+      - 'test-go-1.14-386':
+          requires:
+            - 'deps'
       - 'nightly':
           requires:
-            - 'test-go-1.12'
-            - 'test-go-1.12-386'
             - 'test-go-1.13'
             - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
     triggers:
       - schedule:
           cron: "0 7 * * *"
diff --git a/README.md b/README.md
index 3391a038e..c749811de 100644
--- a/README.md
+++ b/README.md
@@ -51,9 +51,9 @@ Ansible role: https://github.com/rossmcdonald/telegraf
 
 ### From Source:
 
-Telegraf requires Go version 1.12 or newer, the Makefile requires GNU make.
+Telegraf requires Go version 1.13 or newer, the Makefile requires GNU make.
 
-1. [Install Go](https://golang.org/doc/install) >=1.12 (1.13 recommended)
+1. [Install Go](https://golang.org/doc/install) >=1.13 (1.14 recommended)
 2. Clone the Telegraf repository:
    ```
    cd ~/src
diff --git a/appveyor.yml b/appveyor.yml
index bff7dc0cb..b454c8dc8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,7 @@
 version: "{build}"
 
+image: Visual Studio 2019
+
 cache:
  - C:\gopath\pkg\mod -> go.sum
  - C:\ProgramData\chocolatey\bin -> appveyor.yml
@@ -8,13 +10,13 @@ cache:
 clone_folder: C:\gopath\src\github.com\influxdata\telegraf
 
 environment:
-  GOVERSION: 1.13.8
   GOPATH: C:\gopath
 
+stack: go 1.14
+
 platform: x64
 
 install:
-  - choco install golang --version "%GOVERSION%"
   - choco install make
   - cd "%GOPATH%\src\github.com\influxdata\telegraf"
   - git config --system core.longpaths true
diff --git a/docs/TLS.md b/docs/TLS.md
index 363b0d968..3cd6a1025 100644
--- a/docs/TLS.md
+++ b/docs/TLS.md
@@ -20,9 +20,23 @@ For client TLS support we have the following options:
 # insecure_skip_verify = false
 ```
 
+### Server Configuration
+
+The server TLS configuration provides support for TLS mutual authentication:
+
+```toml
+## Set one or more allowed client CA certificate file names to
+## enable mutually authenticated TLS connections.
+# tls_allowed_cacerts = ["/etc/telegraf/clientca.pem"]
+
+## Add service certificate and key.
+# tls_cert = "/etc/telegraf/cert.pem"
+# tls_key = "/etc/telegraf/key.pem"
+```
+
 #### Advanced Configuration
 
-For plugins using the standard client configuration you can also set several
+For plugins using the standard server configuration you can also set several
 advanced settings.  These options are not included in the sample configuration
 for the interest of brevity.
 
@@ -47,14 +61,14 @@ for the interest of brevity.
 ## 	         "TLS_RSA_WITH_AES_128_CBC_SHA256",
 ## 	         "TLS_RSA_WITH_AES_128_CBC_SHA",
 ## 	         "TLS_RSA_WITH_AES_256_CBC_SHA"
-#       ]
+##       ]
 # tls_cipher_suites = []
 
 ## Minimum TLS version that is acceptable.
 # tls_min_version = "TLS10"
 
 ## Maximum SSL/TLS version that is acceptable.
-# tls_max_version = "TLS12"
+# tls_max_version = "TLS13"
 ```
 
 Cipher suites for use with `tls_cipher_suites`:
@@ -80,8 +94,6 @@ Cipher suites for use with `tls_cipher_suites`:
 - `TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384`
 - `TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305`
 - `TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305`
-
-TLS 1.3 cipher suites require Telegraf 1.12 and Go 1.12 or later:
 - `TLS_AES_128_GCM_SHA256`
 - `TLS_AES_256_GCM_SHA384`
 - `TLS_CHACHA20_POLY1305_SHA256`
@@ -90,24 +102,4 @@ TLS versions for use with `tls_min_version` or `tls_max_version`:
 - `TLS10`
 - `TLS11`
 - `TLS12`
-- `TLS13` (Telegraf 1.12 and Go 1.12 required, must enable TLS 1.3 using environment variables)
-
-### TLS 1.3
-
-TLS 1.3 is available only on an opt-in basis in Go 1.12. To enable it, set the
-GODEBUG environment variable (comma-separated key=value options) such that it
-includes "tls13=1".
-
-### Server Configuration
-
-The server TLS configuration provides support for TLS mutual authentication:
-
-```toml
-## Set one or more allowed client CA certificate file names to
-## enable mutually authenticated TLS connections.
-# tls_allowed_cacerts = ["/etc/telegraf/clientca.pem"]
-
-## Add service certificate and key.
-# tls_cert = "/etc/telegraf/cert.pem"
-# tls_key = "/etc/telegraf/key.pem"
-```
+- `TLS13`
diff --git a/internal/tls/common.go b/internal/tls/common.go
index 3100a73a1..1ceb20c3f 100644
--- a/internal/tls/common.go
+++ b/internal/tls/common.go
@@ -6,6 +6,7 @@ var tlsVersionMap = map[string]uint16{
 	"TLS10": tls.VersionTLS10,
 	"TLS11": tls.VersionTLS11,
 	"TLS12": tls.VersionTLS12,
+	"TLS13": tls.VersionTLS13,
 }
 
 var tlsCipherMap = map[string]uint16{
@@ -31,4 +32,7 @@ var tlsCipherMap = map[string]uint16{
 	"TLS_RSA_WITH_RC4_128_SHA":                tls.TLS_RSA_WITH_RC4_128_SHA,
 	"TLS_ECDHE_RSA_WITH_RC4_128_SHA":          tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
 	"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA":        tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
+	"TLS_AES_128_GCM_SHA256":                  tls.TLS_AES_128_GCM_SHA256,
+	"TLS_AES_256_GCM_SHA384":                  tls.TLS_AES_256_GCM_SHA384,
+	"TLS_CHACHA20_POLY1305_SHA256":            tls.TLS_CHACHA20_POLY1305_SHA256,
 }
diff --git a/internal/tls/common_go112.go b/internal/tls/common_go112.go
deleted file mode 100644
index 988d6f936..000000000
--- a/internal/tls/common_go112.go
+++ /dev/null
@@ -1,12 +0,0 @@
-// +build go1.12
-
-package tls
-
-import "crypto/tls"
-
-func init() {
-	tlsVersionMap["TLS13"] = tls.VersionTLS13
-	tlsCipherMap["TLS_AES_128_GCM_SHA256"] = tls.TLS_AES_128_GCM_SHA256
-	tlsCipherMap["TLS_AES_256_GCM_SHA384"] = tls.TLS_AES_256_GCM_SHA384
-	tlsCipherMap["TLS_CHACHA20_POLY1305_SHA256"] = tls.TLS_CHACHA20_POLY1305_SHA256
-}
diff --git a/plugins/inputs/apcupsd/apcupsd_test.go b/plugins/inputs/apcupsd/apcupsd_test.go
index dfad765b3..e749d5137 100644
--- a/plugins/inputs/apcupsd/apcupsd_test.go
+++ b/plugins/inputs/apcupsd/apcupsd_test.go
@@ -1,5 +1,3 @@
-// +build go1.11
-
 package apcupsd
 
 import (
diff --git a/plugins/inputs/clickhouse/clickhouse.go b/plugins/inputs/clickhouse/clickhouse.go
index cf28def66..4336444eb 100644
--- a/plugins/inputs/clickhouse/clickhouse.go
+++ b/plugins/inputs/clickhouse/clickhouse.go
@@ -205,6 +205,10 @@ func (ch *ClickHouse) Gather(acc telegraf.Accumulator) (err error) {
 	return nil
 }
 
+func (ch *ClickHouse) Stop() {
+	ch.client.CloseIdleConnections()
+}
+
 func (ch *ClickHouse) clusterIncludeExcludeFilter() string {
 	if len(ch.ClusterInclude) == 0 && len(ch.ClusterExclude) == 0 {
 		return ""
diff --git a/plugins/inputs/clickhouse/clickhouse_go1.11.go b/plugins/inputs/clickhouse/clickhouse_go1.11.go
deleted file mode 100644
index e043dd492..000000000
--- a/plugins/inputs/clickhouse/clickhouse_go1.11.go
+++ /dev/null
@@ -1,6 +0,0 @@
-// +build !go1.12
-
-package clickhouse
-
-// Stop ClickHouse input service
-func (ch *ClickHouse) Stop() {}
diff --git a/plugins/inputs/clickhouse/clickhouse_go1.12.go b/plugins/inputs/clickhouse/clickhouse_go1.12.go
deleted file mode 100644
index 86bb69e2b..000000000
--- a/plugins/inputs/clickhouse/clickhouse_go1.12.go
+++ /dev/null
@@ -1,8 +0,0 @@
-// +build go1.12
-
-package clickhouse
-
-// Stop ClickHouse input service
-func (ch *ClickHouse) Stop() {
-	ch.client.CloseIdleConnections()
-}
diff --git a/scripts/ci-1.12.docker b/scripts/ci-1.12.docker
deleted file mode 100644
index f3f59349a..000000000
--- a/scripts/ci-1.12.docker
+++ /dev/null
@@ -1,28 +0,0 @@
-FROM golang:1.12.17
-
-RUN chmod -R 755 "$GOPATH"
-
-RUN DEBIAN_FRONTEND=noninteractive \
-	apt update && apt install -y --no-install-recommends \
-	autoconf \
-	git \
-	libtool \
-	locales \
-	make \
-	python-boto \
-	rpm \
-	ruby \
-	ruby-dev \
-	zip && \
-	rm -rf /var/lib/apt/lists/*
-
-RUN ln -sf /usr/share/zoneinfo/Etc/UTC /etc/localtime
-RUN locale-gen C.UTF-8 || true
-ENV LANG=C.UTF-8
-
-RUN gem install fpm
-
-RUN go get -d github.com/golang/dep && \
-    cd src/github.com/golang/dep && \
-    git checkout -q v0.5.0 && \
-    go install -ldflags="-X main.version=v0.5.0" ./cmd/dep
diff --git a/scripts/ci-1.13.docker b/scripts/ci-1.13.docker
index 9ee601ee1..0f312bc21 100644
--- a/scripts/ci-1.13.docker
+++ b/scripts/ci-1.13.docker
@@ -1,4 +1,4 @@
-FROM golang:1.13.8
+FROM golang:1.13.11
 
 RUN chmod -R 755 "$GOPATH"
 
diff --git a/scripts/ci-1.9.docker b/scripts/ci-1.14.docker
similarity index 66%
rename from scripts/ci-1.9.docker
rename to scripts/ci-1.14.docker
index 0a931c817..64bf18d9e 100644
--- a/scripts/ci-1.9.docker
+++ b/scripts/ci-1.14.docker
@@ -1,4 +1,4 @@
-FROM golang:1.9.7
+FROM golang:1.14.3
 
 RUN chmod -R 755 "$GOPATH"
 
@@ -21,8 +21,3 @@ RUN locale-gen C.UTF-8 || true
 ENV LANG=C.UTF-8
 
 RUN gem install fpm
-
-RUN go get -d github.com/golang/dep && \
-    cd src/github.com/golang/dep && \
-    git checkout -q v0.5.0 && \
-    go install -ldflags="-X main.version=v0.5.0" ./cmd/dep