diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ef3cace..c2fb240 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -112,7 +112,7 @@ jobs:
             version: '10.1'
             flags: '-test.v -test.short'
           - name: openbsd
-            version: '7.7'
+            version: '7.8'
             flags: '-test.v -test.short'
     runs-on: ubuntu-latest
     needs: test
@@ -128,7 +128,7 @@ jobs:
       run: .github/workflows/build-test.sh
 
     - name: Test
-      uses: cross-platform-actions/action@v0.29.0
+      uses: cross-platform-actions/action@v0.30.0
       with:
         operating_system: ${{ matrix.os.name }}
         architecture: ${{ matrix.os.arch }}
diff --git a/conn.go b/conn.go
index a7eca16..5794b16 100644
--- a/conn.go
+++ b/conn.go
@@ -420,21 +420,21 @@ func busyCallback(ctx context.Context, mod api.Module, pDB ptr_t, count int32) (
 // Status retrieves runtime status information about a database connection.
 //
 // https://sqlite.org/c3ref/db_status.html
-func (c *Conn) Status(op DBStatus, reset bool) (current, highwater int, err error) {
+func (c *Conn) Status(op DBStatus, reset bool) (current, highwater int64, err error) {
 	defer c.arena.mark()()
-	hiPtr := c.arena.new(intlen)
-	curPtr := c.arena.new(intlen)
+	hiPtr := c.arena.new(8)
+	curPtr := c.arena.new(8)
 
 	var i int32
 	if reset {
 		i = 1
 	}
 
-	rc := res_t(c.call("sqlite3_db_status", stk_t(c.handle),
+	rc := res_t(c.call("sqlite3_db_status64", stk_t(c.handle),
 		stk_t(op), stk_t(curPtr), stk_t(hiPtr), stk_t(i)))
 	if err = c.error(rc); err == nil {
-		current = int(util.Read32[int32](c.mod, curPtr))
-		highwater = int(util.Read32[int32](c.mod, hiPtr))
+		current = util.Read64[int64](c.mod, curPtr)
+		highwater = util.Read64[int64](c.mod, hiPtr)
 	}
 	return
 }
diff --git a/const.go b/const.go
index 4a7bae3..a5d92b5 100644
--- a/const.go
+++ b/const.go
@@ -234,7 +234,8 @@ const (
 	DBSTATUS_DEFERRED_FKS        DBStatus = 10
 	DBSTATUS_CACHE_USED_SHARED   DBStatus = 11
 	DBSTATUS_CACHE_SPILL         DBStatus = 12
-	// DBSTATUS_MAX              DBStatus = 12
+	DBSTATUS_TEMPBUF_SPILL       DBStatus = 13
+	// DBSTATUS_MAX              DBStatus = 13
 )
 
 // DBConfig are the available database connection configuration options.
diff --git a/embed/bcw2/bcw2.wasm b/embed/bcw2/bcw2.wasm
index 18e8397..9a1a059 100755
Binary files a/embed/bcw2/bcw2.wasm and b/embed/bcw2/bcw2.wasm differ
diff --git a/embed/bcw2/build.sh b/embed/bcw2/build.sh
index a7276b3..15acaf9 100755
--- a/embed/bcw2/build.sh
+++ b/embed/bcw2/build.sh
@@ -15,9 +15,9 @@ cp "$ROOT"/sqlite3/*.[ch] build/
 cp "$ROOT"/sqlite3/*.patch build/
 cd sqlite/
 
-# https://sqlite.org/src/info/ba2174bdca7d1d1a
-curl -#L https://github.com/sqlite/sqlite/archive/b46738f.tar.gz | tar xz --strip-components=1
-# curl -#L https://sqlite.org/src/tarball/sqlite.tar.gz?r=ba2174bdca | tar xz --strip-components=1
+# https://sqlite.org/src/info/0e862bc9ed7aa9ae
+curl -#L https://github.com/sqlite/sqlite/archive/0b99392.tar.gz | tar xz --strip-components=1
+# curl -#L https://sqlite.org/src/tarball/sqlite.tar.gz?r=0e862bc9ed | tar xz --strip-components=1
 
 if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
 	MSYS_NO_PATHCONV=1 nmake /f makefile.msc sqlite3.c "OPTS=-DSQLITE_ENABLE_UPDATE_DELETE_LIMIT -DSQLITE_ENABLE_ORDERED_SET_AGGREGATES"
@@ -67,4 +67,4 @@ cd ~-
 	--enable-mutable-globals --enable-nontrapping-float-to-int \
 	--enable-simd --enable-bulk-memory --enable-sign-ext \
 	--enable-reference-types --enable-multivalue \
-	--strip --strip-producers
\ No newline at end of file
+	--strip --strip-producers
diff --git a/embed/exports.txt b/embed/exports.txt
index bb049c2..8a13450 100644
--- a/embed/exports.txt
+++ b/embed/exports.txt
@@ -59,7 +59,7 @@ sqlite3_db_filename
 sqlite3_db_name
 sqlite3_db_readonly
 sqlite3_db_release_memory
-sqlite3_db_status
+sqlite3_db_status64
 sqlite3_declare_vtab
 sqlite3_errcode
 sqlite3_errmsg
diff --git a/embed/init_test.go b/embed/init_test.go
index 30b63f8..64f988b 100644
--- a/embed/init_test.go
+++ b/embed/init_test.go
@@ -19,7 +19,7 @@ func Test_init(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if version != "3.50.4" {
+	if version != "3.51.0" {
 		t.Error(version)
 	}
 }
diff --git a/embed/sqlite3.wasm b/embed/sqlite3.wasm
index e44b2cc..8d09414 100755
Binary files a/embed/sqlite3.wasm and b/embed/sqlite3.wasm differ
diff --git a/internal/util/module.go b/internal/util/module.go
index 06b90bb..a308b4e 100644
--- a/internal/util/module.go
+++ b/internal/util/module.go
@@ -26,11 +26,16 @@ func NewContext(ctx context.Context) context.Context {
 }
 
 func GetSystemError(ctx context.Context) error {
-	s := ctx.Value(moduleKey{}).(*moduleState)
-	return s.sysError
+	// Test needed to simplify testing.
+	s, ok := ctx.Value(moduleKey{}).(*moduleState)
+	if ok {
+		return s.sysError
+	}
+	return nil
 }
 
 func SetSystemError(ctx context.Context, err error) {
+	// Test needed to simplify testing.
 	s, ok := ctx.Value(moduleKey{}).(*moduleState)
 	if ok {
 		s.sysError = err
diff --git a/sqlite3/busy_timeout.patch b/sqlite3/busy_timeout.patch
index 7707b8d..b6cf890 100644
--- a/sqlite3/busy_timeout.patch
+++ b/sqlite3/busy_timeout.patch
@@ -2,7 +2,7 @@
 # handle, and interrupt, sqlite3_busy_timeout.
 --- sqlite3.c.orig
 +++ sqlite3.c
-@@ -184474,7 +184474,7 @@
+@@ -186667,7 +186667,7 @@
    if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
  #endif
    if( ms>0 ){
diff --git a/sqlite3/download.sh b/sqlite3/download.sh
index 26cead9..80a34be 100755
--- a/sqlite3/download.sh
+++ b/sqlite3/download.sh
@@ -3,55 +3,54 @@ set -euo pipefail
 
 cd -P -- "$(dirname -- "$0")"
 
-curl -#OL "https://sqlite.org/2025/sqlite-amalgamation-3500400.zip"
+curl -#OL "https://sqlite.org/2025/sqlite-autoconf-3510000.tar.gz"
 
 # Verify download.
-if hash=$(openssl dgst -sha3-256 sqlite-amalgamation-*.zip); then
-  if ! [[ $hash =~ f131b68e6ba5fb891cc13ebb5ff9555054c77294cb92d8d1268bad5dba4fa2a1 ]]; then
+if hash=$(openssl dgst -sha3-256 sqlite-autoconf-*.tar.gz); then
+  if ! [[ $hash =~ fa52f9cc74dbca004aa650ae698036a3350611f672649e165078f4eae21d6a2e ]]; then
     echo $hash
     exit 1
   fi
 fi 2> /dev/null
 
-unzip -d . sqlite-amalgamation-*.zip
-mv sqlite-amalgamation-*/sqlite3.c .
-mv sqlite-amalgamation-*/sqlite3.h .
-mv sqlite-amalgamation-*/sqlite3ext.h .
-rm -rf sqlite-amalgamation-*
+tar xzf sqlite-autoconf-*.tar.gz
 
-# To test a snapshot:
+# To test a snapshot instead:
 # curl -# https://sqlite.org/snapshot/sqlite-snapshot-202410081727.tar.gz | tar xz
-# mv sqlite-snapshot-*/sqlite3.c .
-# mv sqlite-snapshot-*/sqlite3.h .
-# mv sqlite-snapshot-*/sqlite3ext.h .
-# rm -rf sqlite-snapshot-*
+
+mv sqlite-*/sqlite3.c .
+mv sqlite-*/sqlite3.h .
+mv sqlite-*/sqlite3ext.h .
+rm -r sqlite-*
+
+GITHUB_TAG="https://github.com/sqlite/sqlite/raw/version-3.51.0"
 
 mkdir -p ext/
 cd ext/
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/anycollseq.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/base64.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/decimal.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/ieee754.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/regexp.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/series.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/spellfix.c"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/ext/misc/uint.c"
+curl -#OL "$GITHUB_TAG/ext/misc/anycollseq.c"
+curl -#OL "$GITHUB_TAG/ext/misc/base64.c"
+curl -#OL "$GITHUB_TAG/ext/misc/decimal.c"
+curl -#OL "$GITHUB_TAG/ext/misc/ieee754.c"
+curl -#OL "$GITHUB_TAG/ext/misc/regexp.c"
+curl -#OL "$GITHUB_TAG/ext/misc/series.c"
+curl -#OL "$GITHUB_TAG/ext/misc/spellfix.c"
+curl -#OL "$GITHUB_TAG/ext/misc/uint.c"
 cd ~-
 
 cd ../vfs/tests/mptest/testdata/
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/mptest/config01.test"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/mptest/config02.test"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/mptest/crash01.test"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/mptest/crash02.subtest"
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/mptest/multiwrite01.test"
+curl -#OL "$GITHUB_TAG/mptest/config01.test"
+curl -#OL "$GITHUB_TAG/mptest/config02.test"
+curl -#OL "$GITHUB_TAG/mptest/crash01.test"
+curl -#OL "$GITHUB_TAG/mptest/crash02.subtest"
+curl -#OL "$GITHUB_TAG/mptest/multiwrite01.test"
 cd ~-
 
 cd ../vfs/tests/mptest/wasm/
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/mptest/mptest.c"
+curl -#OL "$GITHUB_TAG/mptest/mptest.c"
 cd ~-
 
 cd ../vfs/tests/speedtest1/wasm/
-curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.50.4/test/speedtest1.c"
+curl -#OL "$GITHUB_TAG/test/speedtest1.c"
 cd ~-
 
-cat *.patch | patch -p0 --no-backup-if-mismatch
\ No newline at end of file
+cat *.patch | patch -p0 --no-backup-if-mismatch
diff --git a/sqlite3/vfs_find.patch b/sqlite3/vfs_find.patch
index ef01eea..4f58229 100644
--- a/sqlite3/vfs_find.patch
+++ b/sqlite3/vfs_find.patch
@@ -1,7 +1,7 @@
 # Remove VFS registration. Go handles it.
 --- sqlite3.c.orig
 +++ sqlite3.c
-@@ -26884,7 +26884,7 @@
+@@ -27176,7 +27176,7 @@
    sqlite3_free(p);
    return sqlite3_os_init();
  }
@@ -10,7 +10,7 @@
  /*
  ** The list of all registered VFS implementations.
  */
-@@ -26981,7 +26981,7 @@
+@@ -27273,7 +27273,7 @@
    sqlite3_mutex_leave(mutex);
    return SQLITE_OK;
  }
diff --git a/util/sql3util/wasm/sql3parse_table.wasm b/util/sql3util/wasm/sql3parse_table.wasm
index 824a7bf..198f100 100755
Binary files a/util/sql3util/wasm/sql3parse_table.wasm and b/util/sql3util/wasm/sql3parse_table.wasm differ
diff --git a/vfs/README.md b/vfs/README.md
index 44d5944..f34e08b 100644
--- a/vfs/README.md
+++ b/vfs/README.md
@@ -20,11 +20,12 @@ The main differences to be aware of are
 ### File Locking
 
 POSIX advisory locks,
-which SQLite uses on [Unix](https://github.com/sqlite/sqlite/blob/5d60f4/src/os_unix.c#L13-L14),
-are [broken by design](https://github.com/sqlite/sqlite/blob/5d60f4/src/os_unix.c#L1074-L1162).
+which SQLite uses on [Unix](https://github.com/sqlite/sqlite/blob/41fda52/src/os_unix.c#L13-L14),
+are [broken by design](https://github.com/sqlite/sqlite/blob/41fda52/src/os_unix.c#L1188-L1276).
 Instead, on Linux and macOS, this package uses
-[OFD locks](https://gnu.org/software/libc/manual/html_node/Open-File-Description-Locks.html)
+[OFD locks](https://sourceware.org/glibc/manual/2.25/html_node/Open-File-Description-Locks.html)
 to synchronize access to database files.
+OFD locks require [Linux 3.15](https://lwn.net/Articles/586904/).
 
 This package can also use
 [BSD locks](https://man.freebsd.org/cgi/man.cgi?query=flock&sektion=2),
diff --git a/vfs/adiantum/hbsh.go b/vfs/adiantum/hbsh.go
index 99a6efb..12fbc63 100644
--- a/vfs/adiantum/hbsh.go
+++ b/vfs/adiantum/hbsh.go
@@ -56,7 +56,7 @@ func (h *hbshVFS) OpenFilename(name *vfs.Filename, flags vfs.OpenFlag) (file vfs
 
 	if hbsh == nil {
 		file.Close()
-		return nil, flags, sqlite3.CANTOPEN
+		return nil, flags, sqlite3.IOERR_BADKEY
 	}
 	return &hbshFile{File: file, hbsh: hbsh, init: h.init}, flags, nil
 }
@@ -108,7 +108,7 @@ func (h *hbshFile) Pragma(name string, value string) (string, error) {
 	if h.hbsh = h.init.HBSH(key); h.hbsh != nil {
 		return "ok", nil
 	}
-	return "", sqlite3.CANTOPEN
+	return "", sqlite3.IOERR_BADKEY
 }
 
 func (h *hbshFile) ReadAt(p []byte, off int64) (n int, err error) {
diff --git a/vfs/api.go b/vfs/api.go
index ef0623e..4f4f833 100644
--- a/vfs/api.go
+++ b/vfs/api.go
@@ -207,6 +207,10 @@ type blockingSharedMemory interface {
 	shmEnableBlocking(block bool)
 }
 
+// FileControl makes it easy to forward all fileControl methods,
+// which we want to do for the checksum VFS.
+// However, this is not a safe default, and other VFSes
+// should explicitly wrap the methods they want to wrap.
 type fileControl interface {
 	File
 	fileControl(ctx context.Context, mod api.Module, op _FcntlOpcode, pArg ptr_t) _ErrorCode
diff --git a/vfs/filename.go b/vfs/filename.go
index be16b3d..4d4fc4a 100644
--- a/vfs/filename.go
+++ b/vfs/filename.go
@@ -120,7 +120,7 @@ func (n *Filename) URIParameter(key string) string {
 	}
 
 	// Parse the format from:
-	// https://github.com/sqlite/sqlite/blob/b74eb0/src/pager.c#L4797-L4840
+	// https://github.com/sqlite/sqlite/blob/41fda52/src/pager.c#L4821-L4864
 	// This avoids having to alloc/free the key just to find a value.
 	for {
 		k := util.ReadString(n.mod, ptr, _MAX_NAME)
@@ -160,7 +160,7 @@ func (n *Filename) URIParameters() url.Values {
 	var params url.Values
 
 	// Parse the format from:
-	// https://github.com/sqlite/sqlite/blob/b74eb0/src/pager.c#L4797-L4840
+	// https://github.com/sqlite/sqlite/blob/41fda52/src/pager.c#L4821-L4864
 	// This is the only way to support multiple valued keys.
 	for {
 		k := util.ReadString(n.mod, ptr, _MAX_NAME)
diff --git a/vfs/tests/mptest/wasm/mptest.wasm b/vfs/tests/mptest/wasm/mptest.wasm
index f6de181..97bbcda 100644
Binary files a/vfs/tests/mptest/wasm/mptest.wasm and b/vfs/tests/mptest/wasm/mptest.wasm differ
diff --git a/vfs/tests/speedtest1/wasm/speedtest1.wasm b/vfs/tests/speedtest1/wasm/speedtest1.wasm
index 58cf522..625836f 100644
Binary files a/vfs/tests/speedtest1/wasm/speedtest1.wasm and b/vfs/tests/speedtest1/wasm/speedtest1.wasm differ
diff --git a/vfs/xts/xts.go b/vfs/xts/xts.go
index 89e4c27..f39bca3 100644
--- a/vfs/xts/xts.go
+++ b/vfs/xts/xts.go
@@ -55,7 +55,7 @@ func (x *xtsVFS) OpenFilename(name *vfs.Filename, flags vfs.OpenFlag) (file vfs.
 
 	if cipher == nil {
 		file.Close()
-		return nil, flags, sqlite3.CANTOPEN
+		return nil, flags, sqlite3.IOERR_BADKEY
 	}
 	return &xtsFile{File: file, cipher: cipher, init: x.init}, flags, nil
 }
@@ -103,7 +103,7 @@ func (x *xtsFile) Pragma(name string, value string) (string, error) {
 	if x.cipher = x.init.XTS(key); x.cipher != nil {
 		return "ok", nil
 	}
-	return "", sqlite3.CANTOPEN
+	return "", sqlite3.IOERR_BADKEY
 }
 
 func (x *xtsFile) ReadAt(p []byte, off int64) (n int, err error) {