diff --git a/packages/squiggle-lang/__tests__/ReducerProject/ReducerProject_test.res b/packages/squiggle-lang/__tests__/ReducerProject/ReducerProject_test.res
index aee917a3..fdfb75fc 100644
--- a/packages/squiggle-lang/__tests__/ReducerProject/ReducerProject_test.res
+++ b/packages/squiggle-lang/__tests__/ReducerProject/ReducerProject_test.res
@@ -112,6 +112,25 @@ describe("project2", () => {
   })
 })
 
+describe("removing sources", () => {
+  let project = Project.createProject()
+  Project.setContinues(project, "main", ["second"])
+  Project.setContinues(project, "second", ["first"])
+  Project.setSource(project, "first", "x=1")
+  Project.setSource(project, "second", "y=2")
+  Project.setSource(project, "main", "y")
+
+  Project.removeSource(project, "main")
+
+  test("project doesn't have source", () => {
+    expect(Project.getSource(project, "main")) == None
+  })
+
+  test("dependents get updated", () => {
+    expect(Project.getDependents(project, "second")) == []
+  })
+})
+
 describe("project with include", () => {
   let project = Project.createProject()
   Project.setContinues(project, "main", ["second"])
diff --git a/packages/squiggle-lang/src/js/SqProject.ts b/packages/squiggle-lang/src/js/SqProject.ts
index 9e79b564..84fda5a7 100644
--- a/packages/squiggle-lang/src/js/SqProject.ts
+++ b/packages/squiggle-lang/src/js/SqProject.ts
@@ -22,6 +22,10 @@ export class SqProject {
     return RSProject.setSource(this._value, sourceId, value);
   }
 
+  removeSource(sourceId: string) {
+    RSProject.removeSource(this._value, sourceId);
+  }
+
   getSource(sourceId: string) {
     return RSProject.getSource(this._value, sourceId);
   }
diff --git a/packages/squiggle-lang/src/rescript/ForTS/ForTS_ReducerProject.res b/packages/squiggle-lang/src/rescript/ForTS/ForTS_ReducerProject.res
index ac9c167c..89972e8e 100644
--- a/packages/squiggle-lang/src/rescript/ForTS/ForTS_ReducerProject.res
+++ b/packages/squiggle-lang/src/rescript/ForTS/ForTS_ReducerProject.res
@@ -50,6 +50,13 @@ Sets the source for a given source Id.
 let setSource = (project: reducerProject, sourceId: string, value: string): unit =>
   project->Private.setSource(sourceId, value)
 
+/*
+Removes the source for a given source Id.
+*/
+@genType
+let removeSource = (project: reducerProject, sourceId: string): unit =>
+  project->Private.removeSource(sourceId)
+
 /*
 Gets the source for a given source id.
 */
diff --git a/packages/squiggle-lang/src/rescript/ReducerProject/ReducerProject.res b/packages/squiggle-lang/src/rescript/ReducerProject/ReducerProject.res
index 1942a136..418eaa28 100644
--- a/packages/squiggle-lang/src/rescript/ReducerProject/ReducerProject.res
+++ b/packages/squiggle-lang/src/rescript/ReducerProject/ReducerProject.res
@@ -61,6 +61,10 @@ let setSource = (project: t, sourceId: string, value: string): unit => {
   touchDependents(project, sourceId)
 }
 
+let removeSource = (project: t, sourceId: string): unit => {
+  Belt.MutableMap.String.remove(project.items, sourceId)
+}
+
 let clean = (project: t, sourceId: string): unit => {
   let newItem = project->getItem(sourceId)->ProjectItem.clean
   project->setItem(sourceId, newItem)