diff --git a/data/23/events/praguedefi/data.json b/data/23/events/praguedefi/data.json
index 38fe328..010a319 100644
--- a/data/23/events/praguedefi/data.json
+++ b/data/23/events/praguedefi/data.json
@@ -1,5 +1,22 @@
 {
   "speakers": [
+    {
+      "id": "marc-zeller",
+      "name": "Marc Zeller",
+      "twitter": "lemiscate",
+      "caption": "AAVE",
+      "photoUrl": "https://images.ctfassets.net/6j1me6tz5h39/3LrJr2y42JL5NO7XcqP7xn/355bf0464ed6a98604089fe57c068959/MarcZeller.jpeg",
+      "country": "fr",
+      "photo": "photos/speakers/marc-zeller.jpeg"
+    },
+    {
+      "id": "stanislav-simek",
+      "name": "Stanislav Šimek",
+      "twitter": "Stan_Simek",
+      "caption": "BADOKH",
+      "photoUrl": "https://images.ctfassets.net/6j1me6tz5h39/6BJjdgSTjR32La8WrdC9S3/047214513234227a6f91a667dff54ed1/8259775487b6747_dee460985be8272737fead6d15425b3b_600_FRDEnA6.jpg",
+      "photo": "photos/speakers/stanislav-simek.jpg"
+    },
     {
       "id": "radek-svarz",
       "name": "Radek Svarz",
@@ -18,15 +35,6 @@
       "country": "ro",
       "photo": "photos/speakers/sasha-tanase.jpg"
     },
-    {
-      "id": "marc-zeller",
-      "name": "Marc Zeller",
-      "twitter": "lemiscate",
-      "caption": "AAVE",
-      "photoUrl": "https://images.ctfassets.net/6j1me6tz5h39/3LrJr2y42JL5NO7XcqP7xn/355bf0464ed6a98604089fe57c068959/MarcZeller.jpeg",
-      "country": "fr",
-      "photo": "photos/speakers/marc-zeller.jpeg"
-    },
     {
       "id": "rosco-kalis",
       "name": "Rosco Kalis",
diff --git a/data/23/events/praguedefi/photos/speakers/stanislav-simek.jpg b/data/23/events/praguedefi/photos/speakers/stanislav-simek.jpg
new file mode 100644
index 0000000..79f2195
Binary files /dev/null and b/data/23/events/praguedefi/photos/speakers/stanislav-simek.jpg differ