diff --git a/internal/taskfile/merge.go b/internal/taskfile/merge.go
index a0c71748..b2b32ef9 100644
--- a/internal/taskfile/merge.go
+++ b/internal/taskfile/merge.go
@@ -39,7 +39,20 @@ func Merge(t1, t2 *Taskfile, namespaces ...string) error {
 		t1.Tasks = make(Tasks)
 	}
 	for k, v := range t2.Tasks {
+		// FIXME(@andreynering): Refactor this block, otherwise we can
+		// have serious side-effects in the future, since we're editing
+		// the original references instead of deep copying them.
+
 		t1.Tasks[taskNameWithNamespace(k, namespaces...)] = v
+
+		for _, dep := range v.Deps {
+			dep.Task = taskNameWithNamespace(dep.Task, namespaces...)
+		}
+		for _, cmd := range v.Cmds {
+			if cmd.Task != "" {
+				cmd.Task = taskNameWithNamespace(cmd.Task, namespaces...)
+			}
+		}
 	}
 
 	return nil
diff --git a/task_test.go b/task_test.go
index 7504d140..e4dbd766 100644
--- a/task_test.go
+++ b/task_test.go
@@ -496,3 +496,17 @@ func TestIncludesEmptyMain(t *testing.T) {
 	}
 	tt.Run(t)
 }
+
+func TestIncludesDependencies(t *testing.T) {
+	tt := fileContentTest{
+		Dir:       "testdata/includes_deps",
+		Target:    "default",
+		TrimSpace: true,
+		Files: map[string]string{
+			"default.txt":     "default",
+			"called_dep.txt":  "called_dep",
+			"called_task.txt": "called_task",
+		},
+	}
+	tt.Run(t)
+}
diff --git a/testdata/includes_deps/.gitignore b/testdata/includes_deps/.gitignore
new file mode 100644
index 00000000..2211df63
--- /dev/null
+++ b/testdata/includes_deps/.gitignore
@@ -0,0 +1 @@
+*.txt
diff --git a/testdata/includes_deps/Taskfile.yml b/testdata/includes_deps/Taskfile.yml
new file mode 100644
index 00000000..e6d4d186
--- /dev/null
+++ b/testdata/includes_deps/Taskfile.yml
@@ -0,0 +1,9 @@
+version: '2'
+
+includes:
+  included: Taskfile2.yml
+
+tasks:
+  default:
+    cmds:
+      - task: included:default
diff --git a/testdata/includes_deps/Taskfile2.yml b/testdata/includes_deps/Taskfile2.yml
new file mode 100644
index 00000000..27eb2b97
--- /dev/null
+++ b/testdata/includes_deps/Taskfile2.yml
@@ -0,0 +1,16 @@
+version: '2'
+
+tasks:
+  default:
+    deps: [called_dep]
+    cmds:
+      - echo "default" > default.txt
+      - task: called_task
+
+  called_dep:
+    cmds:
+      - echo "called_dep" > called_dep.txt
+
+  called_task:
+    cmds:
+      - echo "called_task" > called_task.txt