diff --git a/ui/src/data_explorer/components/QueryEditor.tsx b/ui/src/data_explorer/components/QueryEditor.tsx
index 7e0b5815e6..0f64bdec84 100644
--- a/ui/src/data_explorer/components/QueryEditor.tsx
+++ b/ui/src/data_explorer/components/QueryEditor.tsx
@@ -29,7 +29,7 @@ class QueryEditor extends PureComponent<Props, State> {
     this.editor = React.createRef<HTMLTextAreaElement>()
   }
 
-  public componentWillReceiveProps(nextProps) {
+  public componentWillReceiveProps(nextProps: Props) {
     if (this.props.query !== nextProps.query) {
       this.setState({value: nextProps.query})
     }
diff --git a/ui/src/data_explorer/components/Visualization.tsx b/ui/src/data_explorer/components/Visualization.tsx
index 1faf95c8e5..3c308e848e 100644
--- a/ui/src/data_explorer/components/Visualization.tsx
+++ b/ui/src/data_explorer/components/Visualization.tsx
@@ -37,7 +37,7 @@ class DataExplorerVisualization extends PureComponent<Props, State> {
     this.state = this.initialState
   }
 
-  public componentWillReceiveProps(nextProps) {
+  public componentWillReceiveProps(nextProps: Props) {
     const {activeQueryIndex, queryConfigs} = nextProps
     const nextQueryText = this.getQueryText(queryConfigs, activeQueryIndex)
     const queryText = this.getQueryText(
@@ -117,7 +117,7 @@ class DataExplorerVisualization extends PureComponent<Props, State> {
     this.setState({view})
   }
 
-  private getQueryText(queryConfigs, index): string {
+  private getQueryText(queryConfigs: QueryConfig[], index: number): string {
     // rawText can be null
     return _.get(queryConfigs, [`${index}`, 'rawText'], '') || ''
   }
diff --git a/ui/src/data_explorer/components/WriteDataForm.tsx b/ui/src/data_explorer/components/WriteDataForm.tsx
index c54076be32..0ea6d90250 100644
--- a/ui/src/data_explorer/components/WriteDataForm.tsx
+++ b/ui/src/data_explorer/components/WriteDataForm.tsx
@@ -159,7 +159,7 @@ class WriteDataForm extends PureComponent<Props, State> {
     this.fileInput.value = ''
   }
 
-  private handleDragOver = e => {
+  private handleDragOver = (e: DragEvent<HTMLDivElement>) => {
     e.preventDefault()
     e.stopPropagation()
   }
@@ -185,7 +185,7 @@ class WriteDataForm extends PureComponent<Props, State> {
     }
   }
 
-  private handleFileInputRef = r => (this.fileInput = r)
+  private handleFileInputRef = (r: HTMLInputElement) => (this.fileInput = r)
 }
 
 export default OnClickOutside(WriteDataForm)