diff --git a/quartz/plugins/transformers/description.ts b/quartz/plugins/transformers/description.ts
index b582fee..2ec8880 100644
--- a/quartz/plugins/transformers/description.ts
+++ b/quartz/plugins/transformers/description.ts
@@ -42,22 +42,25 @@ export const Description: QuartzTransformerPlugin<Partial<Options> | undefined>
             const finalDesc: string[] = []
             const len = opts.descriptionLength
             let sentenceIdx = 0
+            let currentDescriptionLength = 0
 
             if (sentences[0] !== undefined && sentences[0].length >= len) {
               const firstSentence = sentences[0].split(" ")
-              while (finalDesc.length < len) {
+              while (currentDescriptionLength < len) {
                 const sentence = firstSentence[sentenceIdx]
                 if (!sentence) break
                 finalDesc.push(sentence)
+                currentDescriptionLength += sentence.length
                 sentenceIdx++
               }
               finalDesc.push("...")
             } else {
-              while (finalDesc.length < len) {
+              while (currentDescriptionLength < len) {
                 const sentence = sentences[sentenceIdx]
                 if (!sentence) break
-                finalDesc.push(sentence.endsWith(".") ? sentence : sentence + ".")
-                sentenceIdx++
+                const currentSentence = sentence.endsWith(".") ? sentence : sentence + "."
+                finalDesc.push(currentSentence)
+                currentDescriptionLength += currentSentence.length
               }
             }