diff --git a/README.md b/README.md
index a0d7ac3d..daac7ae5 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,9 @@ to run script files. This client program is separate from the core runtime, so
 Janet can be embedded in other programs. Try Janet in your browser at
 [https://janet-lang.org](https://janet-lang.org).
 
+If you'd like to financially support the ongoing development of Janet, consider
+[sponsoring its primary author](https://github.com/sponsors/bakpakin) through GitHub.
+
 <br>
 
 ## Use Cases
diff --git a/src/core/net.c b/src/core/net.c
index da972fcc..c8c5446d 100644
--- a/src/core/net.c
+++ b/src/core/net.c
@@ -445,7 +445,7 @@ static Janet cfun_net_shutdown(int32_t argc, Janet *argv) {
     janet_arity(argc, 1, 2);
     JanetStream *stream = janet_getabstract(argv, 0, &janet_stream_type);
     janet_stream_flags(stream, JANET_STREAM_SOCKET);
-    int shutdown_type = SHUT_RDWR;
+    int shutdown_type = JANET_SHUTDOWN_RW;
     if (argc == 2) {
         const uint8_t *kw = janet_getkeyword(argv, 1);
         if (0 == janet_cstrcmp(kw, "rw")) {
diff --git a/src/core/pp.c b/src/core/pp.c
index b3488c0c..252543e7 100644
--- a/src/core/pp.c
+++ b/src/core/pp.c
@@ -617,7 +617,7 @@ static void janet_pretty_one(struct pretty *S, Janet x, int is_dict_value) {
                     if (mincap >= INT32_MAX / 2) {
                         S->keysort_capacity = INT32_MAX;
                     } else {
-                        S->keysort_capacity = mincap * 2;
+                        S->keysort_capacity = (int32_t) (mincap * 2);
                     }
                     S->keysort_buffer = janet_srealloc(S->keysort_buffer, sizeof(int32_t) * S->keysort_capacity);
                     if (NULL == S->keysort_buffer) {
diff --git a/src/core/typedarray.c b/src/core/typedarray.c
index 649e3397..1c8dd04e 100644
--- a/src/core/typedarray.c
+++ b/src/core/typedarray.c
@@ -498,16 +498,23 @@ static Janet cfun_typed_array_copy_bytes(int32_t argc, Janet *argv) {
     size_t index_src = janet_getsize(argv, 1);
     JanetTArrayView *dst = janet_getabstract(argv, 2, &janet_ta_view_type);
     size_t index_dst = janet_getsize(argv, 3);
+    if (index_src > src->size || index_dst > dst->size) {
+        janet_panic("invalid buffer index");
+    }
     size_t count = (argc == 5) ? janet_getsize(argv, 4) : 1;
+    if (count > dst->size || count > src->size) {
+        janet_panic("typed array copy out of bounds");
+    }
     size_t src_atom_size = ta_type_sizes[src->type];
     size_t dst_atom_size = ta_type_sizes[dst->type];
     size_t step_src = src->stride * src_atom_size;
     size_t step_dst = dst->stride * dst_atom_size;
     size_t pos_src = (src->as.u8 - src->buffer->data) + (index_src * step_src);
     size_t pos_dst = (dst->as.u8 - dst->buffer->data) + (index_dst * step_dst);
-    uint8_t *ps = src->buffer->data + pos_src, * pd = dst->buffer->data + pos_dst;
-    if ((pos_dst + (count - 1)*step_dst + src_atom_size <= dst->buffer->size) &&
-            (pos_src + (count - 1)*step_src + src_atom_size <= src->buffer->size)) {
+    uint8_t *ps = src->buffer->data + pos_src;
+    uint8_t *pd = dst->buffer->data + pos_dst;
+    if ((pos_dst + (count - 1) * step_dst + src_atom_size <= dst->buffer->size) &&
+            (pos_src + (count - 1) * step_src + src_atom_size <= src->buffer->size)) {
         for (size_t i = 0; i < count; i++) {
             memmove(pd, ps, src_atom_size);
             pd += step_dst;