diff --git a/ffi/cdef.c b/ffi/cdef.c
index 9c22ce7..e8c8a1f 100644
--- a/ffi/cdef.c
+++ b/ffi/cdef.c
@@ -56,8 +56,8 @@ struct curl_ws_frame {
   ...;
 };
 
-int curl_ws_recv(void *curl, void *buffer, int buflen, int *recv, struct curl_ws_frame **meta);
-int curl_ws_send(void *curl, void *buffer, int buflen, int *sent, int fragsize, unsigned int sendflags);
+int curl_ws_recv(void *curl, void *buffer, int buflen, size_t *recv, const struct curl_ws_frame **meta);
+int curl_ws_send(void *curl, void *buffer, int buflen, size_t *sent, int fragsize, unsigned int sendflags);
 
 // mime
 void *curl_mime_init(void* curl);  // -> form
diff --git a/libs.json b/libs.json
index 3825dfe..0e1b619 100644
--- a/libs.json
+++ b/libs.json
@@ -41,7 +41,7 @@
         "pointer_size": 64,
         "libdir": "",
         "sysname": "linux",
-        "link_type": "static",
+        "link_type": "dynamic",
         "libc": "gnu",
         "so_name": "libcurl-impersonate-chrome.so",
         "so_arch": "x86_64"
@@ -52,7 +52,7 @@
         "pointer_size": 64,
         "libdir": "",
         "sysname": "linux",
-        "link_type": "static",
+        "link_type": "dynamic",
         "libc": "musl",
         "so_name": "libcurl-impersonate-chrome.so",
         "so_arch": "x86_64"
@@ -63,7 +63,7 @@
         "pointer_size": 32,
         "libdir": "",
         "sysname": "linux",
-        "link_type": "static",
+        "link_type": "dynamic",
         "libc": "gnu",
         "so_name": "libcurl-impersonate-chrome.so",
         "so_arch": "i386"
@@ -74,7 +74,7 @@
         "pointer_size": 64,
         "libdir": "",
         "sysname": "linux",
-        "link_type": "static",
+        "link_type": "dynamic",
         "libc": "gnu",
         "so_name": "libcurl-impersonate-chrome.so",
         "so_arch": "aarch64"
@@ -96,7 +96,7 @@
         "pointer_size": 32,
         "libdir": "",
         "sysname": "linux",
-        "link_type": "static",
+        "link_type": "dynamic",
         "libc": "gnueabihf",
         "so_name": "libcurl-impersonate-chrome.so",
         "so_arch": "arm"
@@ -107,7 +107,7 @@
         "pointer_size": 32,
         "libdir": "",
         "sysname": "linux",
-        "link_type": "static",
+        "link_type": "dynamic",
         "libc": "gnueabihf",
         "so_name": "libcurl-impersonate-chrome.so",
         "so_arch": "arm"
diff --git a/scripts/build.py b/scripts/build.py
index 4891867..926f2c1 100644
--- a/scripts/build.py
+++ b/scripts/build.py
@@ -103,7 +103,6 @@ def get_curl_libraries():
 ffibuilder = FFI()
 system = platform.system()
 root_dir = Path(__file__).parent.parent
-download_libcurl()
 
 
 ffibuilder.set_source(
@@ -113,7 +112,6 @@ ffibuilder.set_source(
     """,
     # FIXME from `curl-impersonate`
     libraries=get_curl_libraries(),
-    extra_objects=get_curl_archives(),
     library_dirs=[arch["libdir"]],
     source_extension=".c",
     include_dirs=[
@@ -132,4 +130,4 @@ with open(root_dir / "ffi/cdef.c") as f:
 
 
 if __name__ == "__main__":
-    ffibuilder.compile(verbose=False)
+    ffibuilder.compile(verbose=True)