diff --git a/src/App.tsx b/src/App.tsx
index 2690501..fd2066b 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -44,20 +44,34 @@ function makeRequest(queryString, jsonHandler) {
         });
 }
 
-const Entry = (props) => {
+interface EntryProps {
+    conlang: Conlang;
+    entry: SaiEntryProps | JutEntryProps;
+    key: string;
+}
+
+const Entry = (props: EntryProps) => {
     const {conlang} = props;
     if (conlang === Conlang.Saimiar) {
-        return <SaiEntry entry={ props.entry } />;
+        return <SaiEntry entry={ props.entry as SaiEntryProps } />;
     }
 
     if (conlang === Conlang.Juteyuji) {
-        return <JutEntry entry={ props.entry } />;
+        return <JutEntry entry={ props.entry as JutEntryProps } />;
     }
 
     return <div>Conlang { conlang } not yet supported</div>;
 };
 
-const SaiEntry = (props) => {
+interface SaiEntryProps {
+    id: number;
+    sai: string;
+    eng: string;
+    syn_category: string;
+    morph_type: string;
+}
+
+const SaiEntry = (props: {entry: SaiEntryProps}) => {
     const {entry} = props;
     const synCategory = entry.syn_category;
     const isNominal = synCategory === 'nominal';
@@ -75,7 +89,15 @@ const SaiEntry = (props) => {
     );
 };
 
-const JutEntry = (props) => {
+interface JutEntryProps {
+    id: number;
+    jut: string;
+    eng: string;
+    syn_category: string;
+    gender: string;
+}
+
+const JutEntry = (props: {entry: JutEntryProps}) => {
     const {entry} = props;
     console.log(props);
 
@@ -106,7 +128,14 @@ function formatMorphology(entry) {
     </span>);
 }
 
-const Results = (props) => {
+interface ResultsProps {
+    searchResults: any;
+    searchTerm: string;
+    conlang: Conlang;
+    direction: SearchDirection;
+}
+
+const Results = (props: ResultsProps) => {
     const content = () => {
         const {conlang} = props;
         const num = props.searchResults.length;