diff --git a/emscripten/deps.js b/emscripten/deps.js
new file mode 100644
index 0000000000..21110acdb0
--- /dev/null
+++ b/emscripten/deps.js
@@ -0,0 +1,82 @@
+
+var EmscriptenDeps = {
+    ExportPersistantData: () =>
+    {
+        if (!window.JSZip)
+        {
+            alert("JSZip library not found. Aborting");
+            return;
+        }
+        const zipFolder = (folder) =>
+        {
+            let zip = new JSZip();
+            const processFolder = (name) => {
+                let contents;
+                try {
+                    contents = Module.FS.readdir(name);
+                } catch(e) {
+                    return;
+                }
+                contents.forEach((entry) => {
+                    if ([".", ".."].includes(entry)) return;
+                    try {
+                        Module.FS.readFile(name + entry);
+                        processFile(name + entry);
+                    } catch(e) {
+                        processFolder(name + entry + "/");
+                    }
+                })
+            }
+            const processFile = (name) => {
+                zip.file(name, Module.FS.readFile(name));
+            }
+            processFolder(folder);
+            return zip;
+        }
+        const zip = zipFolder("/persistant/");
+        zip.generateAsync({type: "blob"}).then(blob => {
+            const a = document.createElement("a");
+
+            a.href = URL.createObjectURL(blob);
+            a.download = "OpenRCT2-emscripten.zip";
+            a.click();
+            setTimeout(() => URL.revokeObjectURL(a.href), 1000);
+        })
+    },
+    ImportPersistantData: () =>
+    {
+        if (!window.JSZip)
+        {
+            alert("JSZip library not found. Aborting");
+            return;
+        }
+        if (!confirm("Are you sure? This will wipe all current data.")) return;
+        alert("Select a zip file");
+        const input = document.createElement("input");
+        input.type = "file";
+        input.addEventListener("change", async (e) => {
+            let zip = new JSZip();
+            try {
+                zip = await zip.loadAsync(e.target.files[0]);
+            } catch(e) {
+                alert("Not a zip file!");
+                return;
+            }
+            await clearDatabase("/persistant/");
+            for (const k in zip.files) {
+                const entry = zip.files[k];
+                if (entry.dir) {
+                    try {
+                        Module.FS.mkdir("/"+k);
+                    } catch(e) {}
+                } else {
+                    Module.FS.writeFile("/"+k, await entry.async("uint8array"));
+                }
+            }
+            console.log("Database restored");
+        })
+        input.click();
+    }
+};
+
+mergeInto(LibraryManager.library, EmscriptenDeps);
diff --git a/emscripten/static/index.js b/emscripten/static/index.js
index 44823e8c17..b0215dbbaa 100644
--- a/emscripten/static/index.js
+++ b/emscripten/static/index.js
@@ -39,49 +39,6 @@
             {
                 console.log("loading", fileName);
                 return fileName;
-            },
-            funcs: {
-                export: () =>
-                {
-                    const zip = zipFolder("/persistant/");
-                    zip.generateAsync({type: "blob"}).then(blob => {
-                        const a = document.createElement("a");
-
-                        a.href = URL.createObjectURL(blob);
-                        a.download = "OpenRCT2-emscripten.zip";
-                        a.click();
-                        setTimeout(() => URL.revokeObjectURL(a.href), 1000);
-                    })
-                },
-                import: () =>
-                {
-                    if (!confirm("Are you sure? This will wipe all current data.")) return;
-                    alert("Select a zip file");
-                    const input = document.createElement("input");
-                    input.type = "file";
-                    input.addEventListener("change", async (e) => {
-                        let zip = new JSZip();
-                        try {
-                            zip = await zip.loadAsync(e.target.files[0]);
-                        } catch(e) {
-                            alert("Not a zip file!");
-                            return;
-                        }
-                        await clearDatabase("/persistant/");
-                        for (const k in zip.files) {
-                            const entry = zip.files[k];
-                            if (entry.dir) {
-                                try {
-                                    Module.FS.mkdir("/"+k);
-                                } catch(e) {}
-                            } else {
-                                Module.FS.writeFile("/"+k, await entry.async("uint8array"));
-                            }
-                        }
-                        console.log("Database restored");
-                    })
-                    input.click();
-                }
             }
         });
 
@@ -247,31 +204,6 @@ async function clearDatabase(dir) {
     processFolder(dir);
     await new Promise(res => Module.FS.syncfs(false, res));
 }
-function zipFolder(folder) {
-    let zip = new JSZip();
-    const processFolder = (name) => {
-        let contents;
-        try {
-            contents = Module.FS.readdir(name);
-        } catch(e) {
-            return;
-        }
-        contents.forEach((entry) => {
-            if ([".", ".."].includes(entry)) return;
-            try {
-                Module.FS.readFile(name + entry);
-                processFile(name + entry);
-            } catch(e) {
-                processFolder(name + entry + "/");
-            }
-        })
-    }
-    const processFile = (name) => {
-        zip.file(name, Module.FS.readFile(name));
-    }
-    processFolder(folder);
-    return zip;
-}
 function fileExists(path) {
     try {
         Module.FS.readFile(path);
diff --git a/src/openrct2-ui/CMakeLists.txt b/src/openrct2-ui/CMakeLists.txt
index 14ec176c33..dc94b9dcab 100644
--- a/src/openrct2-ui/CMakeLists.txt
+++ b/src/openrct2-ui/CMakeLists.txt
@@ -18,7 +18,7 @@ if (CMAKE_SYSTEM_NAME MATCHES "Emscripten")
     endif ()
     set(SHARED_FLAGS "-fexceptions")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${USE_FLAGS} ${SHARED_FLAGS}")
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EMSCRIPTEN_LDFLAGS} --bind ${SHARED_FLAGS} -s EXPORTED_FUNCTIONS=_GetVersion,_main")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EMSCRIPTEN_LDFLAGS} --bind ${SHARED_FLAGS} -s EXPORTED_FUNCTIONS=_GetVersion,_main --js-library ${ROOT_DIR}/emscripten/deps.js")
     find_package(SpeexDSP REQUIRED)
 elseif (MSVC)
     find_package(SDL2 REQUIRED)
diff --git a/src/openrct2-ui/windows/Options.cpp b/src/openrct2-ui/windows/Options.cpp
index b40f50d85a..0ca04608cc 100644
--- a/src/openrct2-ui/windows/Options.cpp
+++ b/src/openrct2-ui/windows/Options.cpp
@@ -48,6 +48,10 @@
 
 #ifdef __EMSCRIPTEN__
     #include <emscripten.h>
+    extern "C" {
+        extern void ExportPersistantData();
+        extern void ImportPersistantData();
+    }
 #endif
 
 using namespace OpenRCT2;
@@ -1987,10 +1991,10 @@ namespace OpenRCT2::Ui::Windows
                     break;
 #ifdef __EMSCRIPTEN__
                 case WIDX_EXPORT_EMSCRIPTEN_DATA:
-                    MAIN_THREAD_EM_ASM({ Module.funcs.export(); });
+                    ExportPersistantData();
                     break;
                 case WIDX_IMPORT_EMSCRIPTEN_DATA:
-                    MAIN_THREAD_EM_ASM({ Module.funcs.import(); });
+                    ImportPersistantData();
                     break;
 #endif
             }
diff --git a/src/openrct2/CMakeLists.txt b/src/openrct2/CMakeLists.txt
index 0d3b2e19ee..9b206087e8 100644
--- a/src/openrct2/CMakeLists.txt
+++ b/src/openrct2/CMakeLists.txt
@@ -122,7 +122,7 @@ if (CMAKE_SYSTEM_NAME MATCHES "Emscripten")
     endif ()
     set(SHARED_FLAGS "-fexceptions")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${USE_FLAGS} ${SHARED_FLAGS}")
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EMSCRIPTEN_LDFLAGS} --bind ${SHARED_FLAGS}")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EMSCRIPTEN_LDFLAGS} --bind ${SHARED_FLAGS} --js-library ${ROOT_DIR}/emscripten/deps.js")
     find_package(SpeexDSP REQUIRED)
 elseif (MSVC)
     find_package(png 1.6 REQUIRED)