diff --git a/lib/picotls.c b/lib/picotls.c
index 4526e21..ad0c40f 100644
--- a/lib/picotls.c
+++ b/lib/picotls.c
@@ -1361,7 +1361,7 @@
     size_t digest_size = sched->hashes[0].algo->digest_size;
     ptls_hash_context_t *hashes[3] = {sched->hashes[0].ctx, sched->hashes[0].ctx_outer, NULL};
     uint8_t ch1hash[PTLS_MAX_DIGEST_SIZE];
-    uint8_t prefix[4] = {PTLS_HANDSHAKE_TYPE_MESSAGE_HASH, 0, 0, digest_size};
+    uint8_t prefix[4] = {PTLS_HANDSHAKE_TYPE_MESSAGE_HASH, 0, 0, (uint8_t)digest_size};
 
     for (size_t i = 0; hashes[i] != NULL; ++i) {
         hashes[i]->final(hashes[i], ch1hash, PTLS_HASH_FINAL_MODE_RESET);
diff --git a/picotlsvs/picotlsvs.sln b/picotlsvs/picotlsvs.sln
index e6140c4..0322568 100644
--- a/picotlsvs/picotlsvs.sln
+++ b/picotlsvs/picotlsvs.sln
@@ -30,14 +30,6 @@
 		{497433FE-B252-4985-A504-54EB791F57F4} = {497433FE-B252-4985-A504-54EB791F57F4}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "picotls-esni", "picotls-esni\picotls-esni.vcxproj", "{592127C5-DD8C-47ED-8EBA-026B5848C374}"
-	ProjectSection(ProjectDependencies) = postProject
-		{559AC085-1BEF-450A-A62D-0D370561D596} = {559AC085-1BEF-450A-A62D-0D370561D596}
-		{499B82B3-F5A5-4C2E-91EF-A2F77CBC33F5} = {499B82B3-F5A5-4C2E-91EF-A2F77CBC33F5}
-		{56C264BF-822B-4F29-B512-5B26157CA2EC} = {56C264BF-822B-4F29-B512-5B26157CA2EC}
-		{497433FE-B252-4985-A504-54EB791F57F4} = {497433FE-B252-4985-A504-54EB791F57F4}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "picotls-core", "picotls-core\picotls-core.vcxproj", "{497433FE-B252-4985-A504-54EB791F57F4}"
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "picotls-minicrypto", "picotls-minicrypto\picotls-minicrypto.vcxproj", "{559AC085-1BEF-450A-A62D-0D370561D596}"
@@ -98,14 +90,6 @@
 		{15D7D32F-3B62-4B10-A06A-BA1ADD591D7F}.Release|x64.Build.0 = Release|x64
 		{15D7D32F-3B62-4B10-A06A-BA1ADD591D7F}.Release|x86.ActiveCfg = Release|Win32
 		{15D7D32F-3B62-4B10-A06A-BA1ADD591D7F}.Release|x86.Build.0 = Release|Win32
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Debug|x64.ActiveCfg = Debug|x64
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Debug|x64.Build.0 = Debug|x64
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Debug|x86.ActiveCfg = Debug|Win32
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Debug|x86.Build.0 = Debug|Win32
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Release|x64.ActiveCfg = Release|x64
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Release|x64.Build.0 = Release|x64
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Release|x86.ActiveCfg = Release|Win32
-		{592127C5-DD8C-47ED-8EBA-026B5848C374}.Release|x86.Build.0 = Release|Win32
 		{497433FE-B252-4985-A504-54EB791F57F4}.Debug|x64.ActiveCfg = Debug|x64
 		{497433FE-B252-4985-A504-54EB791F57F4}.Debug|x64.Build.0 = Debug|x64
 		{497433FE-B252-4985-A504-54EB791F57F4}.Debug|x86.ActiveCfg = Debug|Win32
diff --git a/t/hpke.c b/t/hpke.c
index 0330064..e2cb010 100644
--- a/t/hpke.c
+++ b/t/hpke.c
@@ -169,7 +169,8 @@
     for (ptls_hpke_kem_t **kem = all_kems; *kem != NULL; ++kem) {
         for (ptls_hpke_cipher_suite_t **cipher = all_ciphers; *cipher != NULL; ++cipher) {
             char namebuf[64];
-            sprintf(namebuf, "%s-%s/%s-%s", (*kem)->keyex->name, (*kem)->hash->name, (*cipher)->hash->name, (*cipher)->aead->name);
+            snprintf(namebuf, sizeof(namebuf), "%s-%s/%s-%s", (*kem)->keyex->name, (*kem)->hash->name, (*cipher)->hash->name,
+                     (*cipher)->aead->name);
             test_kem = *kem;
             test_cipher = *cipher;
             subtest(namebuf, test_one_hpke);
diff --git a/t/picotls.c b/t/picotls.c
index 127481e..96fd3f9 100644
--- a/t/picotls.c
+++ b/t/picotls.c
@@ -558,7 +558,8 @@
     } while (0)
 
     { /* replace none */
-        static const uint8_t encoded_inner[] = {0x00, 0x09, 0x12, 0x34, 0x00, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f}, outer[] = {},
+        static const uint8_t encoded_inner[] = {0x00, 0x09, 0x12, 0x34, 0x00, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f},
+                             outer[] = {0xde, 0xad},
                              expected[] = {0x00, 0x09, 0x12, 0x34, 0x00, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f};
         TEST(0);
     }
@@ -583,8 +584,7 @@
     { /* outer extension not found */
         static const uint8_t encoded_inner[] = {0x00, 0x13, 0x00, 0x01, 0x00, 0x01, 0x31, 0xfd, 0x00, 0x00, 0x05,
                                                 0x04, 0x00, 0x02, 0x00, 0x04, 0x00, 0x05, 0x00, 0x01, 0x35},
-                             outer[] = {0x00, 0x01, 0x00, 0x01, 0x41, 0x00, 0x02, 0x00, 0x01, 0x42, 0x00, 0x03, 0x00,
-                                        0x01, 0x43},
+                             outer[] = {0x00, 0x01, 0x00, 0x01, 0x41, 0x00, 0x02, 0x00, 0x01, 0x42, 0x00, 0x03, 0x00, 0x01, 0x43},
                              expected[] = {0x00, 0x14, 0x00, 0x01, 0x00, 0x01, 0x31, 0x00, 0x02, 0x00, 0x01,
                                            0x42, 0x00, 0x04, 0x00, 0x01, 0x44, 0x00, 0x05, 0x00, 0x01, 0x35};
         TEST(PTLS_ALERT_ILLEGAL_PARAMETER);