diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2719d437..b0d1c27e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,7 +12,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x, 1.19.x, 1.20.x]
+        go-version: [1.21.x, 1.22.x, 1.23.x]
         platform: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.platform }}
     steps:
diff --git a/cmd/zap/cmd/dict.go b/cmd/zap/cmd/dict.go
index 442323fc..db29de80 100644
--- a/cmd/zap/cmd/dict.go
+++ b/cmd/zap/cmd/dict.go
@@ -19,7 +19,7 @@ import (
 	"fmt"
 	"math"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	"github.com/blevesearch/vellum"
 	zap "github.com/blevesearch/zapx/v13"
 	"github.com/spf13/cobra"
diff --git a/cmd/zap/cmd/explore.go b/cmd/zap/cmd/explore.go
index 93ada999..9f3b3257 100644
--- a/cmd/zap/cmd/explore.go
+++ b/cmd/zap/cmd/explore.go
@@ -19,7 +19,7 @@ import (
 	"fmt"
 	"math"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	"github.com/blevesearch/vellum"
 	zap "github.com/blevesearch/zapx/v13"
 	"github.com/spf13/cobra"
diff --git a/dict.go b/dict.go
index 9b7cd1ee..bd54ab03 100644
--- a/dict.go
+++ b/dict.go
@@ -17,7 +17,7 @@ package zap
 import (
 	"fmt"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	index "github.com/blevesearch/bleve_index_api"
 	segment "github.com/blevesearch/scorch_segment_api/v2"
 	"github.com/blevesearch/vellum"
diff --git a/go.mod b/go.mod
index 85d437cd..59cdef48 100644
--- a/go.mod
+++ b/go.mod
@@ -1,19 +1,21 @@
 module github.com/blevesearch/zapx/v13
 
-go 1.19
+go 1.21
+
+toolchain go1.22.6
 
 require (
-	github.com/RoaringBitmap/roaring v1.2.3
-	github.com/blevesearch/bleve_index_api v1.0.6
+	github.com/RoaringBitmap/roaring/v2 v2.4.4
+	github.com/blevesearch/bleve_index_api v1.2.1
 	github.com/blevesearch/mmap-go v1.0.4
-	github.com/blevesearch/scorch_segment_api/v2 v2.1.6
+	github.com/blevesearch/scorch_segment_api/v2 v2.3.2
 	github.com/blevesearch/vellum v1.0.10
 	github.com/golang/snappy v0.0.1
 	github.com/spf13/cobra v1.4.0
 )
 
 require (
-	github.com/bits-and-blooms/bitset v1.2.0 // indirect
+	github.com/bits-and-blooms/bitset v1.12.0 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/mschoch/smat v0.2.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
diff --git a/go.sum b/go.sum
index 0907571f..f9f063a6 100644
--- a/go.sum
+++ b/go.sum
@@ -1,20 +1,22 @@
-github.com/RoaringBitmap/roaring v1.2.3 h1:yqreLINqIrX22ErkKI0vY47/ivtJr6n+kMhVOVmhWBY=
-github.com/RoaringBitmap/roaring v1.2.3/go.mod h1:plvDsJQpxOC5bw8LRteu/MLWHsHez/3y6cubLI4/1yE=
-github.com/bits-and-blooms/bitset v1.2.0 h1:Kn4yilvwNtMACtf1eYDlG8H77R07mZSPbMjLyS07ChA=
-github.com/bits-and-blooms/bitset v1.2.0/go.mod h1:gIdJ4wp64HaoK2YrL1Q5/N7Y16edYb8uY+O0FJTyyDA=
-github.com/blevesearch/bleve_index_api v1.0.6 h1:gyUUxdsrvmW3jVhhYdCVL6h9dCjNT/geNU7PxGn37p8=
-github.com/blevesearch/bleve_index_api v1.0.6/go.mod h1:YXMDwaXFFXwncRS8UobWs7nvo0DmusriM1nztTlj1ms=
+github.com/RoaringBitmap/roaring/v2 v2.4.4 h1:a4k7LUbtIfERkheZ0Or/k5nNxnsnzmKiue+Ac1rljZA=
+github.com/RoaringBitmap/roaring/v2 v2.4.4/go.mod h1:FiJcsfkGje/nZBZgCu0ZxCPOKD/hVXDS2dXi7/eUFE0=
+github.com/bits-and-blooms/bitset v1.12.0 h1:U/q1fAF7xXRhFCrhROzIfffYnu+dlS38vCZtmFVPHmA=
+github.com/bits-and-blooms/bitset v1.12.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
+github.com/blevesearch/bleve_index_api v1.2.1 h1:IuXwLvmyp7I7+e0FOA68gcHHLfzSQ4AqQ8wVab5uxk0=
+github.com/blevesearch/bleve_index_api v1.2.1/go.mod h1:rKQDl4u51uwafZxFrPD1R7xFOwKnzZW7s/LSeK4lgo0=
 github.com/blevesearch/mmap-go v1.0.4 h1:OVhDhT5B/M1HNPpYPBKIEJaD0F3Si+CrEKULGCDPWmc=
 github.com/blevesearch/mmap-go v1.0.4/go.mod h1:EWmEAOmdAS9z/pi/+Toxu99DnsbhG1TIxUoRmJw/pSs=
-github.com/blevesearch/scorch_segment_api/v2 v2.1.6 h1:CdekX/Ob6YCYmeHzD72cKpwzBjvkOGegHOqhAkXp6yA=
-github.com/blevesearch/scorch_segment_api/v2 v2.1.6/go.mod h1:nQQYlp51XvoSVxcciBjtvuHPIVjlWrN1hX4qwK2cqdc=
+github.com/blevesearch/scorch_segment_api/v2 v2.3.2 h1:hvcBElgN+u0aRybfKPCFLjwiOPdT54J9PZVqZjJm170=
+github.com/blevesearch/scorch_segment_api/v2 v2.3.2/go.mod h1:eDTO6kPkiiZRT1jH3UDuHXSYos/G+G8VN5xHG+BPLKM=
 github.com/blevesearch/vellum v1.0.10 h1:HGPJDT2bTva12hrHepVT3rOyIKFFF4t7Gf6yMxyMIPI=
 github.com/blevesearch/vellum v1.0.10/go.mod h1:ul1oT0FhSMDIExNjIxHqJoGpVrBpKCdgDQNxfqgJt7k=
 github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/mschoch/smat v0.2.0 h1:8imxQsjDm8yFEAVBe7azKmKSgzSkZXDuKkSq9374khM=
@@ -33,5 +35,6 @@ golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbuf
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0 h1:hjy8E9ON/egN1tAYqKb61G10WtihqetD4sz2H+8nIeA=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/merge.go b/merge.go
index 6a853a16..e962c6ec 100644
--- a/merge.go
+++ b/merge.go
@@ -23,7 +23,7 @@ import (
 	"os"
 	"sort"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	seg "github.com/blevesearch/scorch_segment_api/v2"
 	"github.com/blevesearch/vellum"
 	"github.com/golang/snappy"
diff --git a/merge_test.go b/merge_test.go
index 3aea005f..3abf58b3 100644
--- a/merge_test.go
+++ b/merge_test.go
@@ -22,7 +22,7 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	index "github.com/blevesearch/bleve_index_api"
 	seg "github.com/blevesearch/scorch_segment_api/v2"
 )
diff --git a/new.go b/new.go
index b4e0d034..47a509a1 100644
--- a/new.go
+++ b/new.go
@@ -21,7 +21,7 @@ import (
 	"sort"
 	"sync"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	index "github.com/blevesearch/bleve_index_api"
 	segment "github.com/blevesearch/scorch_segment_api/v2"
 	"github.com/blevesearch/vellum"
diff --git a/posting.go b/posting.go
index 1ba133d6..a07ea75f 100644
--- a/posting.go
+++ b/posting.go
@@ -20,7 +20,7 @@ import (
 	"math"
 	"reflect"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	segment "github.com/blevesearch/scorch_segment_api/v2"
 )
 
diff --git a/segment.go b/segment.go
index 1fbf7848..936b6383 100644
--- a/segment.go
+++ b/segment.go
@@ -23,7 +23,7 @@ import (
 	"sync"
 	"unsafe"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	mmap "github.com/blevesearch/mmap-go"
 	segment "github.com/blevesearch/scorch_segment_api/v2"
 	"github.com/blevesearch/vellum"
diff --git a/segment_test.go b/segment_test.go
index 1feddb4d..15a1869e 100644
--- a/segment_test.go
+++ b/segment_test.go
@@ -20,7 +20,7 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 	segment "github.com/blevesearch/scorch_segment_api/v2"
 )
 
diff --git a/write.go b/write.go
index 77aefdbf..d3786261 100644
--- a/write.go
+++ b/write.go
@@ -18,7 +18,7 @@ import (
 	"encoding/binary"
 	"io"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 )
 
 // writes out the length of the roaring bitmap in bytes as varint
diff --git a/write_test.go b/write_test.go
index 2e72d4b8..f76512b2 100644
--- a/write_test.go
+++ b/write_test.go
@@ -18,7 +18,7 @@ import (
 	"math"
 	"testing"
 
-	"github.com/RoaringBitmap/roaring"
+	"github.com/RoaringBitmap/roaring/v2"
 )
 
 func TestRoaringSizes(t *testing.T) {
@@ -40,11 +40,11 @@ func TestRoaringSizes(t *testing.T) {
 		{[]uint32{0, 1}, 20, 20},
 		{[]uint32{0, 10000000}, 28, 28},
 
-		{[]uint32{0, 1, 2}, 22, 15},
+		{[]uint32{0, 1, 2}, 22, 22},
 		{[]uint32{0, 1, 20000000}, 30, 30},
 
 		{[]uint32{0, 1, 2, 3}, 24, 15},
-		{[]uint32{0, 1, 2, 30000000}, 32, 21},
+		{[]uint32{0, 1, 2, 30000000}, 32, 32},
 	}
 
 	for _, test := range tests {