diff --git a/internal/repositories/update.go b/internal/repositories/update.go
new file mode 100644
index 0000000..920a54d
--- /dev/null
+++ b/internal/repositories/update.go
@@ -0,0 +1,37 @@
+package repositories
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func Update(repositoryPath string) error {
+	repositoryPath = strings.TrimSuffix(repositoryPath, "/.git")
+
+	err := os.Chdir(repositoryPath)
+
+	if err != nil {
+		return fmt.Errorf("failed to change directory to %s: %w", repositoryPath, err)
+	}
+
+	fmt.Printf("Updating %s\n", repositoryPath)
+
+	commands := [][]string{
+		{"git", "fetch", "--all", "--jobs=4", "--progress", "--prune"},
+		{"git", "pull", "--rebase"},
+	}
+
+	for _, args := range commands {
+		cmd := exec.Command(args[0], args[1:]...)
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+
+		if err := cmd.Run(); err != nil {
+			return fmt.Errorf("%s failed: %w", strings.Join(args, " "), err)
+		}
+	}
+
+	return nil
+}
diff --git a/main.go b/main.go
index 9898df4..0d9ebc4 100644
--- a/main.go
+++ b/main.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"log"
 	"strings"
 
@@ -19,20 +18,20 @@ func main() {
 	dirs := cfg.Directories
 
 	for _, dir := range dirs {
-		repositories, err := repositories.FindInDirectory(dir)
+		repositoryPaths, err := repositories.FindInDirectory(dir)
 
 		if err != nil {
 			// TODO
 		}
 
-		lines := strings.SplitSeq(repositories, "\n")
+		lines := strings.SplitSeq(repositoryPaths, "\n")
 
 		for repositoryPath := range lines {
 			if repositoryPath == "" {
 				continue
 			}
 
-			fmt.Println(repositoryPath)
+			repositories.Update(repositoryPath)
 		}
 	}
 }
diff --git a/todo.txt b/todo.txt
index 8604042..c146fa0 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,4 +1,4 @@
 * Load directories from a configuration file
+* Update the repositories within each directory.
 
-Update the repositories within each directory.
 Make depth configurable per directory.