diff --git a/collection.go b/collection.go
index 2c0dbb8..41fab96 100644
--- a/collection.go
+++ b/collection.go
@@ -105,7 +105,7 @@ func (c *Collection) findFreeIndex(count uint64) uint32 {
 	}
 
 	// Otherwise, we scan the fill bitmap until we find the first zero.
-	idx, _ := c.fill.FirstZero()
+	idx, _ := c.fill.MinZero()
 	return idx
 }
 
diff --git a/collection_test.go b/collection_test.go
index f426b33..bcd0eed 100644
--- a/collection_test.go
+++ b/collection_test.go
@@ -23,7 +23,7 @@ import (
 cpu: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
 BenchmarkCollection/insert-8         	 5531546	       215.9 ns/op	      18 B/op	       0 allocs/op
 BenchmarkCollection/fetch-8          	23749724	        44.97 ns/op	       0 B/op	       0 allocs/op
-BenchmarkCollection/scan-8           	     784	   1527506 ns/op	     160 B/op	       0 allocs/op
+BenchmarkCollection/scan-8           	     855	   1388532 ns/op	      88 B/op	       0 allocs/op
 BenchmarkCollection/count-8          	 1000000	      1081 ns/op	       0 B/op	       0 allocs/op
 BenchmarkCollection/range-8          	   10000	    100833 ns/op	      14 B/op	       0 allocs/op
 BenchmarkCollection/update-at-8      	 4225484	       281.7 ns/op	       0 B/op	       0 allocs/op
diff --git a/go.mod b/go.mod
index 1c90b01..d89293d 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,6 @@ go 1.16
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/kelindar/bitmap v1.0.9
+	github.com/kelindar/bitmap v1.0.12
 	github.com/stretchr/testify v1.7.0
 )
diff --git a/go.sum b/go.sum
index 387a3c7..33ff660 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,8 @@
 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/kelindar/bitmap v1.0.9 h1:jVaK6cdq9uvjK0ZsZT6oLRCfad1KnZLRcAWk99b4Z6Q=
-github.com/kelindar/bitmap v1.0.9/go.mod h1:shAFyS8BOif+pvJ05GqxnCM0SdohHQjKvDetqI/9z6M=
+github.com/kelindar/bitmap v1.0.12 h1:MD696wPzddmfP/XrSm+kApsfVNJ5muR/2Sb2VAf+8QE=
+github.com/kelindar/bitmap v1.0.12/go.mod h1:shAFyS8BOif+pvJ05GqxnCM0SdohHQjKvDetqI/9z6M=
 github.com/klauspost/cpuid/v2 v2.0.6 h1:dQ5ueTiftKxp0gyjKSx5+8BtPWkyQbd95m8Gys/RarI=
 github.com/klauspost/cpuid/v2 v2.0.6/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=