diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 74d5710..4183793 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -14,9 +14,6 @@ permissions:
 jobs:
   build:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        go: [1.14, 1.16]
     steps:
     - uses: actions/checkout@629c2de402a417ea7690ca6ce3f33229e27606a5 # v2
       with:
@@ -25,7 +22,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@f6164bd8c8acb4a71fb2791a8b6c4024ff038dab # v2
       with:
-        go-version: ${{ matrix.go }}
+        go-version: 1.18
 
     - name: Setup Ruby
       uses: ruby/setup-ruby@bd94d6a504586da892a5753afdd1480096ed30df # v1.62.0
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index b2281f8..a778183 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -14,9 +14,6 @@ permissions:
 jobs:
   build:
     runs-on: macos-latest
-    strategy:
-      matrix:
-        go: [1.14, 1.16]
     steps:
     - uses: actions/checkout@629c2de402a417ea7690ca6ce3f33229e27606a5 # v2
       with:
@@ -25,7 +22,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@f6164bd8c8acb4a71fb2791a8b6c4024ff038dab # v2
       with:
-        go-version: ${{ matrix.go }}
+        go-version: 1.18
 
     - name: Setup Ruby
       uses: ruby/setup-ruby@bd94d6a504586da892a5753afdd1480096ed30df # v1.62.0
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..4933a41
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+golang 1.18
diff --git a/src/protector/protector.go b/src/protector/protector.go
index 2739c01..fe84b38 100644
--- a/src/protector/protector.go
+++ b/src/protector/protector.go
@@ -1,4 +1,4 @@
-// +build !openbsd
+//go:build !openbsd
 
 package protector
 
diff --git a/src/protector/protector_openbsd.go b/src/protector/protector_openbsd.go
index 84a5ded..34784a6 100644
--- a/src/protector/protector_openbsd.go
+++ b/src/protector/protector_openbsd.go
@@ -1,4 +1,4 @@
-// +build openbsd
+//go:build openbsd
 
 package protector
 
diff --git a/src/result_others.go b/src/result_others.go
index e3363a8..0d9dcd7 100644
--- a/src/result_others.go
+++ b/src/result_others.go
@@ -1,4 +1,4 @@
-// +build !386,!amd64
+//go:build !386 && !amd64
 
 package fzf
 
diff --git a/src/result_test.go b/src/result_test.go
index 4084fdb..2fd3127 100644
--- a/src/result_test.go
+++ b/src/result_test.go
@@ -1,5 +1,3 @@
-// +build !tcell
-
 package fzf
 
 import (
diff --git a/src/result_x86.go b/src/result_x86.go
index 60e26e9..3e3fd58 100644
--- a/src/result_x86.go
+++ b/src/result_x86.go
@@ -1,4 +1,4 @@
-// +build 386 amd64
+//go:build 386 || amd64
 
 package fzf
 
diff --git a/src/terminal_unix.go b/src/terminal_unix.go
index b14cd68..4cee73b 100644
--- a/src/terminal_unix.go
+++ b/src/terminal_unix.go
@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package fzf
 
diff --git a/src/terminal_windows.go b/src/terminal_windows.go
index 5e74873..a1ea7a2 100644
--- a/src/terminal_windows.go
+++ b/src/terminal_windows.go
@@ -1,4 +1,4 @@
-// +build windows
+//go:build windows
 
 package fzf
 
diff --git a/src/tui/dummy.go b/src/tui/dummy.go
index af7e759..686a100 100644
--- a/src/tui/dummy.go
+++ b/src/tui/dummy.go
@@ -1,6 +1,4 @@
-// +build !ncurses
-// +build !tcell
-// +build !windows
+//go:build !tcell && !windows
 
 package tui
 
diff --git a/src/tui/light_unix.go b/src/tui/light_unix.go
index 936a13e..6dc058c 100644
--- a/src/tui/light_unix.go
+++ b/src/tui/light_unix.go
@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package tui
 
diff --git a/src/tui/light_windows.go b/src/tui/light_windows.go
index 875bf6f..db829d3 100644
--- a/src/tui/light_windows.go
+++ b/src/tui/light_windows.go
@@ -1,4 +1,4 @@
-//+build windows
+//go:build windows
 
 package tui
 
diff --git a/src/tui/tcell.go b/src/tui/tcell.go
index 82c7566..6f9b53a 100644
--- a/src/tui/tcell.go
+++ b/src/tui/tcell.go
@@ -1,4 +1,4 @@
-// +build tcell windows
+//go:build tcell || windows
 
 package tui
 
diff --git a/src/tui/tcell_test.go b/src/tui/tcell_test.go
index aa63b72..96ea7ed 100644
--- a/src/tui/tcell_test.go
+++ b/src/tui/tcell_test.go
@@ -1,4 +1,4 @@
-// +build tcell windows
+//go:build tcell || windows
 
 package tui
 
diff --git a/src/tui/ttyname_unix.go b/src/tui/ttyname_unix.go
index 68298cd..b5f4741 100644
--- a/src/tui/ttyname_unix.go
+++ b/src/tui/ttyname_unix.go
@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package tui
 
diff --git a/src/tui/ttyname_windows.go b/src/tui/ttyname_windows.go
index 8db490a..39b84f7 100644
--- a/src/tui/ttyname_windows.go
+++ b/src/tui/ttyname_windows.go
@@ -1,4 +1,4 @@
-// +build windows
+//go:build windows
 
 package tui
 
diff --git a/src/util/util_unix.go b/src/util/util_unix.go
index 6331275..a76f770 100644
--- a/src/util/util_unix.go
+++ b/src/util/util_unix.go
@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package util
 
diff --git a/src/util/util_windows.go b/src/util/util_windows.go
index e4e0437..b3f4e01 100644
--- a/src/util/util_windows.go
+++ b/src/util/util_windows.go
@@ -1,4 +1,4 @@
-// +build windows
+//go:build windows
 
 package util