diff --git a/client/js/helpers/i18n.ts b/client/js/helpers/i18n.ts
index a80d9c28d3..7f3cc72d0d 100644
--- a/client/js/helpers/i18n.ts
+++ b/client/js/helpers/i18n.ts
@@ -99,4 +99,4 @@ export function i18nFormat(translated: string, params?: {[index: string]: string
     return formatted;
 }
 
-export const LocalizationContext = React.createContext();
+export const LocalizationContext = React.createContext(undefined);
diff --git a/client/js/templates/SourceParam.tsx b/client/js/templates/SourceParam.tsx
index 27a1f82017..d65182d002 100644
--- a/client/js/templates/SourceParam.tsx
+++ b/client/js/templates/SourceParam.tsx
@@ -98,7 +98,7 @@ export default function SourceParam(
             <select
                 id={`${spoutParamName}-${sourceId}`}
                 name={spoutParamName}
-                size="1"
+                size={1}
                 value={value}
                 onChange={updateSourceParam}
             >
diff --git a/client/package-lock.json b/client/package-lock.json
index 05cf9cf43c..d3d4e2af07 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -21,8 +21,6 @@
         "form-urlencoded": "^6.0.0",
         "html-escaper": "^3.0.0",
         "lodash-es": "^4.17.21",
-        "prop-types": "^15.7.2",
-        "prop-types-nullable": "^1.0.1",
         "ramda": "^0.30.0",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",
@@ -40,6 +38,7 @@
         "@parcel/transformer-sass": "^2.0.0",
         "@parcel/transformer-webmanifest": "^2.0.0",
         "@types/history": "^4.7.11",
+        "@types/react": "^18.2.17",
         "@typescript-eslint/eslint-plugin": "^6.2.0",
         "@typescript-eslint/parser": "^6.2.0",
         "autoprefixer": "^10.4.0",
@@ -2503,6 +2502,22 @@
       "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
       "dev": true
     },
+    "node_modules/@types/prop-types": {
+      "version": "15.7.12",
+      "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.12.tgz",
+      "integrity": "sha512-5zvhXYtRNRluoE/jAp4GVsSduVUzNWKkOZrCDBWYtE7biZywwdC2AcEzg+cSMLFRfVgeAFqpfNabiPjxFddV1Q==",
+      "dev": true
+    },
+    "node_modules/@types/react": {
+      "version": "18.3.3",
+      "resolved": "https://registry.npmjs.org/@types/react/-/react-18.3.3.tgz",
+      "integrity": "sha512-hti/R0pS0q1/xx+TsI73XIqk26eBsISZ2R0wUijXIngRK9R/e7Xw/cXVxQK7R5JjW+SV4zGcn5hXjudkN/pLIw==",
+      "dev": true,
+      "dependencies": {
+        "@types/prop-types": "*",
+        "csstype": "^3.0.2"
+      }
+    },
     "node_modules/@types/semver": {
       "version": "7.5.8",
       "resolved": "https://registry.npmjs.org/@types/semver/-/semver-7.5.8.tgz",
@@ -3489,6 +3504,12 @@
       "optional": true,
       "peer": true
     },
+    "node_modules/csstype": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
+      "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
+      "dev": true
+    },
     "node_modules/data-view-buffer": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/data-view-buffer/-/data-view-buffer-1.0.1.tgz",
@@ -6350,14 +6371,6 @@
         "react-is": "^16.13.1"
       }
     },
-    "node_modules/prop-types-nullable": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/prop-types-nullable/-/prop-types-nullable-1.0.1.tgz",
-      "integrity": "sha512-ks2Z+cf/d4dPGVSDVY9pUOaNxoTZ1AyNOdzvNBmUZJoqsRIhlFCI/eY5wywtIlkGg96OvrEZBCB0TqnRgBzopA==",
-      "peerDependencies": {
-        "prop-types": "*"
-      }
-    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
diff --git a/client/package.json b/client/package.json
index 7850376c7d..f8a2e1dbe4 100644
--- a/client/package.json
+++ b/client/package.json
@@ -33,6 +33,7 @@
     "@parcel/transformer-sass": "^2.0.0",
     "@parcel/transformer-webmanifest": "^2.0.0",
     "@types/history": "^4.7.11",
+    "@types/react": "^18.2.17",
     "@typescript-eslint/eslint-plugin": "^6.2.0",
     "@typescript-eslint/parser": "^6.2.0",
     "autoprefixer": "^10.4.0",