diff --git a/NEWS.md b/NEWS.md
index 6b4acf8..11b53fe 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,7 @@
 # cpp11bigwig (development version)
 
+* Sync with [libBigWig v0.4.8](https://github.com/dpryan79/libBigWig/releases/tag/0.4.8)
+
 # cpp11bigwig 0.1.0
 
 * Initial CRAN submission.
diff --git a/README.Rmd b/README.Rmd
index 0d81d6b..643c4f5 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -38,6 +38,7 @@ pak::pak("rnabioco/cpp11bigwig")
 ```
 :::
 
+## Usage
 
 ```{r}
 library(cpp11bigwig)
diff --git a/README.md b/README.md
index 6bcd5de..4f28f20 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,8 @@ pak::pak("rnabioco/cpp11bigwig")
 
 </div>
 
+## Usage
+
 ``` r
 library(cpp11bigwig)
 
diff --git a/src/libBigWig/bigWig.h b/src/libBigWig/bigWig.h
index 441afea..f157a74 100644
--- a/src/libBigWig/bigWig.h
+++ b/src/libBigWig/bigWig.h
@@ -56,7 +56,7 @@ extern "C" {
 /*!
  * The library version number
  */
-#define LIBBIGWIG_VERSION 0.4.7
+#define LIBBIGWIG_VERSION 0.4.8
 
 /*!
  * If 1, then this library was compiled with remote file support.
diff --git a/src/libBigWig/bwValues.c b/src/libBigWig/bwValues.c
index 29a2bd3..e9a7740 100644
--- a/src/libBigWig/bwValues.c
+++ b/src/libBigWig/bwValues.c
@@ -135,8 +135,7 @@ static bwOverlapBlock_t *overlapsLeaf(bwRTreeNode_t *node, uint32_t tid, uint32_
     if(!o) return NULL;
 
     for(i=0; i<node->nChildren; i++) {
-        if(tid < node->chrIdxStart[i]) break;
-        if(tid > node->chrIdxEnd[i]) continue;
+        if(tid < node->chrIdxStart[i] || tid > node->chrIdxEnd[i]) continue;
 
         /*
           The individual blocks can theoretically span multiple contigs.
@@ -162,7 +161,6 @@ static bwOverlapBlock_t *overlapsLeaf(bwRTreeNode_t *node, uint32_t tid, uint32_
         if(!o->size) goto error;
 
         for(i=0; i<node->nChildren; i++) {
-            if(tid < node->chrIdxStart[i]) break;
             if(tid < node->chrIdxStart[i] || tid > node->chrIdxEnd[i]) continue;
             if(node->chrIdxStart[i] != node->chrIdxEnd[i]) {
                 if(tid == node->chrIdxStart[i]) {