diff --git a/README.md b/README.md
index 83ee059..f4e6795 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ Utilities:
  * [ ] `setsid`
  * [x] `sha1sum`
  * [x] `sha224sum`
- * [ ] `sha256sum`
+ * [x] `sha256sum`
  * [ ] `sha384sum`
  * [ ] `sha512-224sum`
  * [ ] `sha512-256sum`
diff --git a/hashsum.go b/hashsum.go
index 9a6f3a1..1df396f 100644
--- a/hashsum.go
+++ b/hashsum.go
@@ -18,6 +18,7 @@ import (
 var MD5Regex = regexp.MustCompile("^(?P<hash>[0-9a-f]{32})  (?P<filename>.*)$")
 var SHA1Regex = regexp.MustCompile("^(?P<hash>[0-9a-f]{40})  (?P<filename>.*)$")
 var SHA224Regex = regexp.MustCompile("^(?P<hash>[0-9a-f]{56})  (?P<filename>.*)$")
+var SHA256Regex = regexp.MustCompile("^(?P<hash>[0-9a-f]{64})  (?P<filename>.*)$")
 
 // SumFunc is a type of function that computes a hash.Hash for data in io.Reader
 type SumFunc func(io.Reader) (hash.Hash, error)
@@ -41,6 +42,10 @@ func SHA224Sum(r io.Reader) (hash.Hash, error) {
 	return copyIntoHash(r, sha256.New224())
 }
 
+func SHA256Sum(r io.Reader) (hash.Hash, error) {
+	return copyIntoHash(r, sha256.New())
+}
+
 type CheckingResults struct {
 	ImproperlyFormattedCount uint
 	InvalidChecksumCount     uint
diff --git a/sha256sum/sha256sum.go b/sha256sum/sha256sum.go
new file mode 100644
index 0000000..6abd771
--- /dev/null
+++ b/sha256sum/sha256sum.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+	common "source.heropunch.io/tomo/go-coreutils"
+)
+
+func main() {
+	common.SumMain(common.SHA256Regex, common.SHA256Sum)
+}