diff --git a/src/index/block_index.rs b/src/index/block_index.rs
index 8ab3e033cb..8f63cec17d 100644
--- a/src/index/block_index.rs
+++ b/src/index/block_index.rs
@@ -171,6 +171,15 @@ impl BlockIndex {
     index: &Index,
     block_height: u64,
   ) -> Result<Vec<InscriptionId>> {
+    if index.block_count()?
+      > self.lowest_blessed_by_block.len() as u64 + self.first_inscription_height
+    {
+      return Err(anyhow!(
+        "Block index not fully indexed ({} indexed of {})",
+        self.lowest_blessed_by_block.len() as u64 + self.first_inscription_height,
+        index.block_count()?
+      ));
+    }
     if block_height >= index.block_count()? || block_height < self.first_inscription_height {
       return Ok(Vec::new());
     }
diff --git a/src/templates/inscriptions_block.rs b/src/templates/inscriptions_block.rs
index 9619934535..67d97e3962 100644
--- a/src/templates/inscriptions_block.rs
+++ b/src/templates/inscriptions_block.rs
@@ -17,9 +17,14 @@ impl InscriptionsBlockHtml {
     inscriptions: Vec<InscriptionId>,
     page_index: usize,
   ) -> Result<Self> {
-    let start = page_index * 100;
-    let end = start + 100;
     let num_inscriptions = inscriptions.len();
+
+    let start = page_index * 100;
+    let end = usize::min(start + 100, num_inscriptions);
+
+    if start > num_inscriptions || start > end {
+      return Err(anyhow!("page index {page_index} exceeds inscription count"));
+    }
     let inscriptions = inscriptions[start..end].to_vec();
 
     Ok(Self {
@@ -36,7 +41,7 @@ impl InscriptionsBlockHtml {
       } else {
         None
       },
-      next_page: if page_index * 100 <= num_inscriptions {
+      next_page: if (page_index + 1) * 100 <= num_inscriptions {
         Some(page_index + 1)
       } else {
         None