diff --git a/lib/py/src/ext/binary.h b/lib/py/src/ext/binary.h
index dedeec3..960b0d0 100644
--- a/lib/py/src/ext/binary.h
+++ b/lib/py/src/ext/binary.h
@@ -113,7 +113,8 @@
     if (!readBytes(&buf, sizeof(int16_t))) {
       return false;
     }
-    val = static_cast<int16_t>(ntohs(*reinterpret_cast<int16_t*>(buf)));
+    memcpy(&val, buf, sizeof(int16_t));
+    val = ntohs(val);
     return true;
   }
 
@@ -122,7 +123,8 @@
     if (!readBytes(&buf, sizeof(int32_t))) {
       return false;
     }
-    val = static_cast<int32_t>(ntohl(*reinterpret_cast<int32_t*>(buf)));
+    memcpy(&val, buf, sizeof(int32_t));
+    val = ntohl(val);
     return true;
   }
 
@@ -131,7 +133,8 @@
     if (!readBytes(&buf, sizeof(int64_t))) {
       return false;
     }
-    val = static_cast<int64_t>(ntohll(*reinterpret_cast<int64_t*>(buf)));
+    memcpy(&val, buf, sizeof(int64_t));
+    val = ntohll(val);
     return true;
   }
 
diff --git a/lib/py/src/ext/compact.h b/lib/py/src/ext/compact.h
index 5bba237..a78d7a7 100644
--- a/lib/py/src/ext/compact.h
+++ b/lib/py/src/ext/compact.h
@@ -162,7 +162,8 @@
     if (!readBytes(&buf, 8)) {
       return false;
     }
-    transfer.f = letohll(*reinterpret_cast<int64_t*>(buf));
+    memcpy(&transfer.f, buf, sizeof(int64_t));
+    transfer.f = letohll(transfer.f);
     val = transfer.t;
     return true;
   }
diff --git a/lib/py/src/ext/protocol.tcc b/lib/py/src/ext/protocol.tcc
index 6e978d7..c025d0c 100644
--- a/lib/py/src/ext/protocol.tcc
+++ b/lib/py/src/ext/protocol.tcc
@@ -102,7 +102,7 @@
     PyErr_SetString(PyExc_IOError, "failed to write to cStringIO object");
     return false;
   }
-  if (len != size) {
+  if (static_cast<size_t>(len) != size) {
     PyErr_Format(PyExc_EOFError, "write length mismatch: expected %lu got %d", size, len);
     return false;
   }