diff --git a/.gitignore b/.gitignore
index 4713f5d..f8cf0ca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
+# project binary
 /minitrust
+
+# redo metadata
+.redo/
diff --git a/README.md b/README.md
index 51a7eb0..3999fbc 100644
--- a/README.md
+++ b/README.md
@@ -29,4 +29,13 @@ minitrust uses [go-minisign][go-minisign].
 
 ## Compile
 
+Build from source with Go 1.18+.
+
 	% go build -o . ./cmd/minitrust/minitrust.go
+
+Also, building with redo is supported.
+
+	% redo
+
+For more information about redo, I recommend installing
+[goredo](http://www.goredo.cypherpunks.ru/).
diff --git a/all.do b/all.do
new file mode 100644
index 0000000..9efc8b5
--- /dev/null
+++ b/all.do
@@ -0,0 +1 @@
+redo-ifchange minitrust
diff --git a/clean.do b/clean.do
new file mode 100644
index 0000000..cfc7c62
--- /dev/null
+++ b/clean.do
@@ -0,0 +1 @@
+rm -f minitrust
diff --git a/minitrust.do b/minitrust.do
new file mode 100644
index 0000000..26b261e
--- /dev/null
+++ b/minitrust.do
@@ -0,0 +1,3 @@
+redo-ifchange cmd/minitrust/minitrust.go *.go
+
+go build -o $3 ./cmd/minitrust