diff --git a/lib/src/array.h b/lib/src/array.h
index 5ff5580a..abec9410 100644
--- a/lib/src/array.h
+++ b/lib/src/array.h
@@ -170,10 +170,10 @@ static inline void array__swap(VoidArray *self, VoidArray *other) {
   *self = swap;
 }
 
-static inline void array__grow(VoidArray *self, size_t count, size_t element_size) {
-  size_t new_size = self->size + count;
+static inline void array__grow(VoidArray *self, uint32_t count, size_t element_size) {
+  uint32_t new_size = self->size + count;
   if (new_size > self->capacity) {
-    size_t new_capacity = self->capacity * 2;
+    uint32_t new_capacity = self->capacity * 2;
     if (new_capacity < 8) new_capacity = 8;
     if (new_capacity < new_size) new_capacity = new_size;
     array__reserve(self, element_size, new_capacity);
diff --git a/lib/src/query.c b/lib/src/query.c
index 65775816..710a9209 100644
--- a/lib/src/query.c
+++ b/lib/src/query.c
@@ -1918,11 +1918,11 @@ static TSQueryError ts_query__parse_string_literal(
       prev_position = stream->input + stream->next_size;
     } else {
       if (stream->next == '\\') {
-        array_extend(&self->string_buffer, (stream->input - prev_position), prev_position);
+        array_extend(&self->string_buffer, (uint32_t)(stream->input - prev_position), prev_position);
         prev_position = stream->input + 1;
         is_escaped = true;
       } else if (stream->next == '"') {
-        array_extend(&self->string_buffer, (stream->input - prev_position), prev_position);
+        array_extend(&self->string_buffer, (uint32_t)(stream->input - prev_position), prev_position);
         stream_advance(stream);
         return TSQueryErrorNone;
       } else if (stream->next == '\n') {
@@ -3669,7 +3669,7 @@ static inline bool ts_query_cursor__advance(
             } else {
               LOG("  finish pattern %u\n", state->pattern_index);
               array_push(&self->finished_states, *state);
-              array_erase(&self->states, state - self->states.contents);
+              array_erase(&self->states, (uint32_t)(state - self->states.contents));
               did_match = true;
               i--;
             }
diff --git a/lib/src/stack.c b/lib/src/stack.c
index caad7b47..98e3a96f 100644
--- a/lib/src/stack.c
+++ b/lib/src/stack.c
@@ -326,7 +326,7 @@ inline StackSliceArray stack__iter(
   bool include_subtrees = false;
   if (goal_subtree_count >= 0) {
     include_subtrees = true;
-    array_reserve(&iterator.subtrees, ts_subtree_alloc_size(goal_subtree_count) / sizeof(Subtree));
+    array_reserve(&iterator.subtrees, (uint32_t)ts_subtree_alloc_size(goal_subtree_count) / sizeof(Subtree));
   }
 
   array_push(&self->iterators, iterator);