diff --git a/src/collecting.ts b/src/collecting.ts
index 0f91aad..1f0325a 100644
--- a/src/collecting.ts
+++ b/src/collecting.ts
@@ -510,6 +510,13 @@ export function collectDataFromFrontmatterKey(
                 renderInfo.textValueMap
             );
             // console.log(retParse);
+            if (retParse.value === null) {
+                // Try parsing as a boolean: true means 1, false means 0.
+                if (deepValue === 'true' || deepValue === 'false') {
+                    retParse.type = ValueType.Number;
+                    retParse.value = deepValue === 'true' ? 1 : 0;
+                }
+            }
             if (retParse.value !== null) {
                 if (retParse.type === ValueType.Time) {
                     query.valueType = ValueType.Time;
diff --git a/src/helper.ts b/src/helper.ts
index 22aef7d..3c7fd36 100644
--- a/src/helper.ts
+++ b/src/helper.ts
@@ -316,7 +316,7 @@ export function deepValue(obj: any, str: string) {
     }
     if (typeof obj === "string" || Array.isArray(obj)) {
         return obj;
-    } else if (typeof obj === "number") {
+    } else if (typeof obj === "number" || typeof obj === "boolean") {
         return obj.toString();
     }
     return null;