diff --git a/src/collections/serialize/index.ts b/src/collections/serialize/index.ts
index a2c5092c..41fe93e4 100644
--- a/src/collections/serialize/index.ts
+++ b/src/collections/serialize/index.ts
@@ -1642,23 +1642,25 @@ export class Serialize {
           };
           break;
         case 'timeDecay': {
-          const { curve, ...timeDecay } = func as TimeDecay;
+          const { curve, decay, ...timeDecay } = func as TimeDecay;
           condProto = {
             ...condProto,
             timeDecay: Boost_TimeDecayFunction.fromPartial({
               ...timeDecay,
               curve: this.boostCurve(curve),
+              decayValue: decay,
             }),
           };
           break;
         }
         case 'numericDecay': {
-          const { curve, ...numericDecay } = func as NumericDecay;
+          const { curve, decay, ...numericDecay } = func as NumericDecay;
           condProto = {
             ...condProto,
             numericDecay: Boost_NumericDecayFunction.fromPartial({
               ...numericDecay,
               curve: this.boostCurve(curve),
+              decayValue: decay,
             }),
           };
           break;
@@ -1678,7 +1680,6 @@ export class Serialize {
       out.conditions.push(condProto);
     }
 
-    console.error(JSON.stringify(out));
     return out;
   };
 
diff --git a/src/collections/serialize/unit.test.ts b/src/collections/serialize/unit.test.ts
index b8915e43..34ccec11 100644
--- a/src/collections/serialize/unit.test.ts
+++ b/src/collections/serialize/unit.test.ts
@@ -34,7 +34,7 @@ import {
   Targets,
 } from '../../proto/v1/base_search.js';
 import { GenerativeSearch } from '../../proto/v1/generative.js';
-import { GroupBy, MetadataRequest, PropertiesRequest } from '../../proto/v1/search_get.js';
+import { Boost_DecayCurve, GroupBy, MetadataRequest, PropertiesRequest } from '../../proto/v1/search_get.js';
 import { Filters as FiltersFactory } from '../filters/classes.js';
 import filter from '../filters/index.js';
 import { Bm25OperatorOptions, TargetVectorInputType } from '../query/types.js';
@@ -1032,6 +1032,76 @@ describe('Unit testing of Serialize', () => {
       });
     });
   });
+
+  describe('.boostGRPC', () => {
+    it('should serialize a TimeDecay boost to the full proto shape with decay mapped to decayValue', () => {
+      const out = Serialize.boostGRPC({
+        conditions: [
+          {
+            func: {
+              type: 'timeDecay',
+              property: 'createdAt',
+              scale: '35d',
+              origin: '2024-01-01T00:00:00Z',
+              curve: 'exponential',
+              decay: 0.2,
+            },
+          },
+        ],
+      });
+      expect(out).toEqual({
+        weight: undefined,
+        depth: undefined,
+        conditions: [
+          {
+            weight: undefined,
+            timeDecay: {
+              property: 'createdAt',
+              origin: '2024-01-01T00:00:00Z',
+              scale: '35d',
+              offset: undefined,
+              curve: Boost_DecayCurve.DECAY_CURVE_EXPONENTIAL,
+              decayValue: 0.2,
+            },
+          },
+        ],
+      });
+    });
+
+    it('should serialize a NumericDecay boost to the full proto shape with decay mapped to decayValue', () => {
+      const out = Serialize.boostGRPC({
+        conditions: [
+          {
+            func: {
+              type: 'numericDecay',
+              property: 'rating',
+              scale: 10,
+              origin: 0,
+              curve: 'linear',
+              decay: 0.5,
+            },
+          },
+        ],
+      });
+      expect(out).toEqual({
+        weight: undefined,
+        depth: undefined,
+        conditions: [
+          {
+            weight: undefined,
+            numericDecay: {
+              property: 'rating',
+              origin: 0,
+              scale: 10,
+              offset: undefined,
+              curve: Boost_DecayCurve.DECAY_CURVE_LINEAR,
+              decayValue: 0.5,
+            },
+          },
+        ],
+      });
+    });
+  });
 });
 
 describe('Unit testing of DataGuards', () => {