diff --git a/README.md b/README.md
index a979d16..83ee059 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ Utilities:
  * [ ] `seq`
  * [ ] `setsid`
  * [x] `sha1sum`
- * [ ] `sha224sum`
+ * [x] `sha224sum`
  * [ ] `sha256sum`
  * [ ] `sha384sum`
  * [ ] `sha512-224sum`
diff --git a/hashsum.go b/hashsum.go
index e15ecc2..9a6f3a1 100644
--- a/hashsum.go
+++ b/hashsum.go
@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"crypto/md5"
 	"crypto/sha1"
+	"crypto/sha256"
 	"errors"
 	"fmt"
 	"hash"
@@ -16,6 +17,7 @@ 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>.*)$")
 
 // SumFunc is a type of function that computes a hash.Hash for data in io.Reader
 type SumFunc func(io.Reader) (hash.Hash, error)
@@ -35,6 +37,10 @@ func SHA1Sum(r io.Reader) (hash.Hash, error) {
 	return copyIntoHash(r, sha1.New())
 }
 
+func SHA224Sum(r io.Reader) (hash.Hash, error) {
+	return copyIntoHash(r, sha256.New224())
+}
+
 type CheckingResults struct {
 	ImproperlyFormattedCount uint
 	InvalidChecksumCount     uint
diff --git a/sha224sum/sha224sum.go b/sha224sum/sha224sum.go
new file mode 100644
index 0000000..6b3f46b
--- /dev/null
+++ b/sha224sum/sha224sum.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+	common "source.heropunch.io/tomo/go-coreutils"
+)
+
+func main() {
+	common.SumMain(common.SHA224Regex, common.SHA224Sum)
+}