diff --git a/.circleci/config.yml b/.circleci/config.yml
index 67ae73422d..4988610277 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -232,8 +232,8 @@ commands:
       - run:
           name: "Install dependencies"
           command: |
-            curl https://dl.google.com/go/go1.13.darwin-amd64.tar.gz -o go1.13.darwin-amd64.tar.gz
-            sudo tar -C /usr/local -xzf go1.13.darwin-amd64.tar.gz
+            curl https://dl.google.com/go/go1.14.darwin-amd64.tar.gz -o go1.14.darwin-amd64.tar.gz
+            sudo tar -C /usr/local -xzf go1.14.darwin-amd64.tar.gz
             ln -s /usr/local/go/bin/go /usr/local/bin/go
             HOMEBREW_NO_AUTO_UPDATE=1 brew install qemu
       - restore_cache:
@@ -327,14 +327,20 @@ jobs:
     steps:
       - test-linux:
           llvm: "10"
+  test-llvm10-go114:
+    docker:
+      - image: circleci/golang:1.14-buster
+    steps:
+      - test-linux:
+          llvm: "10"
   assert-test-linux:
     docker:
-      - image: circleci/golang:1.13-stretch
+      - image: circleci/golang:1.14-stretch
     steps:
       - assert-test-linux
   build-linux:
     docker:
-      - image: circleci/golang:1.13-stretch
+      - image: circleci/golang:1.14-stretch
     steps:
       - build-linux
   build-macos:
@@ -352,6 +358,7 @@ workflows:
       - test-llvm9-go111
       - test-llvm10-go112
       - test-llvm10-go113
+      - test-llvm10-go114
       - build-linux
       - build-macos
       - assert-test-linux
diff --git a/Dockerfile b/Dockerfile
index 4632c4fb2a..6d958125eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-# TinyGo base stage installs Go 1.13, LLVM 10 and the TinyGo compiler itself.
-FROM golang:1.13 AS tinygo-base
+# TinyGo base stage installs Go 1.14, LLVM 10 and the TinyGo compiler itself.
+FROM golang:1.14 AS tinygo-base
 
 RUN wget -O- https://apt.llvm.org/llvm-snapshot.gpg.key| apt-key add - && \
     echo "deb http://apt.llvm.org/buster/ llvm-toolchain-buster-10 main" >> /etc/apt/sources.list && \
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 135dcf4142..40a222a16c 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -12,7 +12,7 @@ jobs:
   steps:
     - task: GoTool@0
       inputs:
-        version: '1.13.8'
+        version: '1.14.1'
     - checkout: self
     - task: CacheBeta@0
       displayName: Cache LLVM source
diff --git a/builder/config.go b/builder/config.go
index 8bb3a1162f..aabf82ac5a 100644
--- a/builder/config.go
+++ b/builder/config.go
@@ -25,8 +25,8 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if err != nil {
 		return nil, fmt.Errorf("could not read version from GOROOT (%v): %v", goroot, err)
 	}
-	if major != 1 || (minor != 11 && minor != 12 && minor != 13) {
-		return nil, fmt.Errorf("requires go version 1.11, 1.12, or 1.13, got go%d.%d", major, minor)
+	if major != 1 || minor < 11 || minor > 14 {
+		return nil, fmt.Errorf("requires go version 1.11, 1.12, 1.13, or 1.14, got go%d.%d", major, minor)
 	}
 	clangHeaderPath := getClangHeaderPath(goenv.Get("TINYGOROOT"))
 	return &compileopts.Config{
diff --git a/cgo/cgo_test.go b/cgo/cgo_test.go
index e9ae2f43e7..5673ebad8d 100644
--- a/cgo/cgo_test.go
+++ b/cgo/cgo_test.go
@@ -11,6 +11,7 @@ import (
 	"go/types"
 	"io/ioutil"
 	"path/filepath"
+	"regexp"
 	"runtime"
 	"strings"
 	"testing"
@@ -19,6 +20,21 @@ import (
 // Pass -update to go test to update the output of the test files.
 var flagUpdate = flag.Bool("update", false, "Update images based on test output.")
 
+// normalizeResult normalizes Go source code that comes out of tests across
+// platforms and Go versions.
+func normalizeResult(result string) string {
+	actual := strings.Replace(result, "\r\n", "\n", -1)
+
+	// Make sure all functions are wrapped, even those that would otherwise be
+	// single-line functions. This is necessary because Go 1.14 changed the way
+	// such functions are wrapped and it's important to have consistent test
+	// results.
+	re := regexp.MustCompile(`func \((.+)\)( .*?) +{ (.+) }`)
+	actual = re.ReplaceAllString(actual, "func ($1)$2 {\n\t$3\n}")
+
+	return actual
+}
+
 func TestCGo(t *testing.T) {
 	var cflags = []string{"--target=armv6m-none-eabi"}
 
@@ -74,7 +90,7 @@ func TestCGo(t *testing.T) {
 			if err != nil {
 				t.Errorf("could not write out CGo AST: %v", err)
 			}
-			actual := strings.Replace(string(buf.Bytes()), "\r\n", "\n", -1)
+			actual := normalizeResult(string(buf.Bytes()))
 
 			// Read the file with the expected output, to compare against.
 			outfile := filepath.Join("testdata", name+".out.go")
diff --git a/cgo/testdata/types.out.go b/cgo/testdata/types.out.go
index 8a750080bb..af638b9e74 100644
--- a/cgo/testdata/types.out.go
+++ b/cgo/testdata/types.out.go
@@ -62,12 +62,18 @@ type C.union3_t = C.union_1
 type C.union_nested_t = C.union_3
 type C.unionarray_t = struct{ arr [10]C.uchar }
 
-func (s *C.struct_4) bitfield_a() C.uchar          { return s.__bitfield_1 & 0x1f }
-func (s *C.struct_4) set_bitfield_a(value C.uchar) { s.__bitfield_1 = s.__bitfield_1&^0x1f | value&0x1f<<0 }
+func (s *C.struct_4) bitfield_a() C.uchar {
+	return s.__bitfield_1 & 0x1f
+}
+func (s *C.struct_4) set_bitfield_a(value C.uchar) {
+	s.__bitfield_1 = s.__bitfield_1&^0x1f | value&0x1f<<0
+}
 func (s *C.struct_4) bitfield_b() C.uchar {
 	return s.__bitfield_1 >> 5 & 0x1
 }
-func (s *C.struct_4) set_bitfield_b(value C.uchar) { s.__bitfield_1 = s.__bitfield_1&^0x20 | value&0x1<<5 }
+func (s *C.struct_4) set_bitfield_b(value C.uchar) {
+	s.__bitfield_1 = s.__bitfield_1&^0x20 | value&0x1<<5
+}
 func (s *C.struct_4) bitfield_c() C.uchar {
 	return s.__bitfield_1 >> 6
 }
@@ -94,25 +100,45 @@ type C.struct_type1 struct {
 }
 type C.struct_type2 struct{ _type C.int }
 
-func (union *C.union_1) unionfield_i() *C.int   { return (*C.int)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_1) unionfield_d() *float64 { return (*float64)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_1) unionfield_s() *C.short { return (*C.short)(unsafe.Pointer(&union.$union)) }
+func (union *C.union_1) unionfield_i() *C.int {
+	return (*C.int)(unsafe.Pointer(&union.$union))
+}
+func (union *C.union_1) unionfield_d() *float64 {
+	return (*float64)(unsafe.Pointer(&union.$union))
+}
+func (union *C.union_1) unionfield_s() *C.short {
+	return (*C.short)(unsafe.Pointer(&union.$union))
+}
 
 type C.union_1 struct{ $union uint64 }
 
-func (union *C.union_2) unionfield_area() *C.point2d_t  { return (*C.point2d_t)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_2) unionfield_solid() *C.point3d_t { return (*C.point3d_t)(unsafe.Pointer(&union.$union)) }
+func (union *C.union_2) unionfield_area() *C.point2d_t {
+	return (*C.point2d_t)(unsafe.Pointer(&union.$union))
+}
+func (union *C.union_2) unionfield_solid() *C.point3d_t {
+	return (*C.point3d_t)(unsafe.Pointer(&union.$union))
+}
 
 type C.union_2 struct{ $union [3]uint32 }
 
-func (union *C.union_3) unionfield_point() *C.point3d_t    { return (*C.point3d_t)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_3) unionfield_array() *C.unionarray_t { return (*C.unionarray_t)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_3) unionfield_thing() *C.union3_t     { return (*C.union3_t)(unsafe.Pointer(&union.$union)) }
+func (union *C.union_3) unionfield_point() *C.point3d_t {
+	return (*C.point3d_t)(unsafe.Pointer(&union.$union))
+}
+func (union *C.union_3) unionfield_array() *C.unionarray_t {
+	return (*C.unionarray_t)(unsafe.Pointer(&union.$union))
+}
+func (union *C.union_3) unionfield_thing() *C.union3_t {
+	return (*C.union3_t)(unsafe.Pointer(&union.$union))
+}
 
 type C.union_3 struct{ $union [2]uint64 }
 
-func (union *C.union_union2d) unionfield_i() *C.int      { return (*C.int)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_union2d) unionfield_d() *[2]float64 { return (*[2]float64)(unsafe.Pointer(&union.$union)) }
+func (union *C.union_union2d) unionfield_i() *C.int {
+	return (*C.int)(unsafe.Pointer(&union.$union))
+}
+func (union *C.union_union2d) unionfield_d() *[2]float64 {
+	return (*[2]float64)(unsafe.Pointer(&union.$union))
+}
 
 type C.union_union2d struct{ $union [2]uint64 }
 type C.enum_option C.int
diff --git a/main_test.go b/main_test.go
index c8f46915e4..ec7f708542 100644
--- a/main_test.go
+++ b/main_test.go
@@ -13,12 +13,14 @@ import (
 	"path/filepath"
 	"runtime"
 	"sort"
+	"strings"
 	"sync"
 	"testing"
 	"time"
 
 	"github.com/tinygo-org/tinygo/builder"
 	"github.com/tinygo-org/tinygo/compileopts"
+	"github.com/tinygo-org/tinygo/goenv"
 )
 
 const TESTDATA = "testdata"
@@ -71,9 +73,20 @@ func TestCompiler(t *testing.T) {
 		t.Run("ARM64Linux", func(t *testing.T) {
 			runPlatTests("aarch64--linux-gnu", matches, t)
 		})
-		t.Run("WebAssembly", func(t *testing.T) {
-			runPlatTests("wasm", matches, t)
-		})
+		goVersion, err := builder.GorootVersionString(goenv.Get("GOROOT"))
+		if err != nil {
+			t.Error("could not get Go version:", err)
+			return
+		}
+		minorVersion := strings.Split(goVersion, ".")[1]
+		if minorVersion != "13" {
+			// WebAssembly tests fail on Go 1.13, so skip them there. Versions
+			// below that are also not supported but still seem to pass, so
+			// include them in the tests for now.
+			t.Run("WebAssembly", func(t *testing.T) {
+				runPlatTests("wasm", matches, t)
+			})
+		}
 	}
 }
 
diff --git a/targets/wasm_exec.js b/targets/wasm_exec.js
index b0bee21591..4c87906677 100644
--- a/targets/wasm_exec.js
+++ b/targets/wasm_exec.js
@@ -202,26 +202,31 @@
 						return;
 				}
 
-				let ref = this._refs.get(v);
-				if (ref === undefined) {
-					ref = this._values.length;
-					this._values.push(v);
-					this._refs.set(v, ref);
+				let id = this._ids.get(v);
+				if (id === undefined) {
+					id = this._idPool.pop();
+					if (id === undefined) {
+						id = this._values.length;
+					}
+					this._values[id] = v;
+					this._goRefCounts[id] = 0;
+					this._ids.set(v, id);
 				}
-				let typeFlag = 0;
+				this._goRefCounts[id]++;
+				let typeFlag = 1;
 				switch (typeof v) {
 					case "string":
-						typeFlag = 1;
+						typeFlag = 2;
 						break;
 					case "symbol":
-						typeFlag = 2;
+						typeFlag = 3;
 						break;
 					case "function":
-						typeFlag = 3;
+						typeFlag = 4;
 						break;
 				}
 				mem().setUint32(addr + 4, nanHead | typeFlag, true);
-				mem().setUint32(addr, ref, true);
+				mem().setUint32(addr, id, true);
 			}
 
 			const loadSlice = (array, len, cap) => {
@@ -284,6 +289,13 @@
 						setTimeout(this._inst.exports.go_scheduler, timeout);
 					},
 
+					// func finalizeRef(v ref)
+					"syscall/js.finalizeRef": (sp) => {
+						// Note: TinyGo does not support finalizers so this should never be
+						// called.
+						console.error('syscall/js.finalizeRef not implemented');
+					},
+
 					// func stringVal(value string) ref
 					"syscall/js.stringVal": (ret_ptr, value_ptr, value_len) => {
 						const s = loadString(value_ptr, value_len);
@@ -405,7 +417,7 @@
 
 		async run(instance) {
 			this._inst = instance;
-			this._values = [ // TODO: garbage collection
+			this._values = [ // JS values that Go currently has references to, indexed by reference id
 				NaN,
 				0,
 				null,
@@ -414,9 +426,10 @@
 				global,
 				this,
 			];
-			this._refs = new Map();
-			this._callbackShutdown = false;
-			this.exited = false;
+			this._goRefCounts = []; // number of references that Go has to a JS value, indexed by reference id
+			this._ids = new Map();  // mapping from JS values to reference ids
+			this._idPool = [];      // unused ids that have been garbage collected
+			this.exited = false;    // whether the Go program has exited
 
 			const mem = new DataView(this._inst.exports.memory.buffer)
 
@@ -472,12 +485,6 @@
 
 		const go = new Go();
 		WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
-			process.on("exit", (code) => { // Node.js exits if no callback is pending
-				if (code === 0 && !go.exited) {
-					// deadlock, make Go print error and stack traces
-					go._callbackShutdown = true;
-				}
-			});
 			return go.run(result.instance);
 		}).catch((err) => {
 			throw err;