diff --git a/src/app/services/task-executions/task-executions-call.ts b/src/app/services/task-executions/task-executions-call.ts
index 5c1c315..7e258bd 100644
--- a/src/app/services/task-executions/task-executions-call.ts
+++ b/src/app/services/task-executions/task-executions-call.ts
@@ -284,7 +284,9 @@ export class TaskExecutionsCallService extends TaskExecutionsCallServiceBase {
     inputName: string,
     file: File
   ): Observable<TaskExecution> {
-    const url = `${environment.apiUrl}/executions/${encodeURIComponent(executionId)}/globals/${encodeURIComponent(inputName)}`;
+    // The bare /globals/{key} endpoint takes JSON, so an upload sent there came back as an
+    // unsupported content type; the upload has its own route, as it does for a node input.
+    const url = `${environment.apiUrl}/executions/${encodeURIComponent(executionId)}/globals/${encodeURIComponent(inputName)}/file`;
     const formData = new FormData();
     formData.append('file', file);
     return this.http.put<unknown>(url, formData).pipe(map((raw) => this.mapExecution(raw)));
@@ -295,11 +297,12 @@ export class TaskExecutionsCallService extends TaskExecutionsCallServiceBase {
     inputName: string,
     files: File[]
   ): Observable<TaskExecution> {
-    const url = `${environment.apiUrl}/executions/${encodeURIComponent(executionId)}/globals`;
+    const url = `${environment.apiUrl}/executions/${encodeURIComponent(executionId)}/globals/${encodeURIComponent(inputName)}/files`;
     const formData = new FormData();
-    formData.append('key', inputName);
+    // Every file goes under "files": the part name is what the endpoint binds on, and naming the
+    // parts after the input meant nothing bound at all.
     for (const file of files) {
-      formData.append(inputName, file);
+      formData.append('files', file);
     }
     return this.http.put<unknown>(url, formData).pipe(map((raw) => this.mapExecution(raw)));
   }