diff --git a/configs/nvidia-master.yaml b/configs/nvidia-master.yaml
index a167f49270..a388cad95d 100644
--- a/configs/nvidia-master.yaml
+++ b/configs/nvidia-master.yaml
@@ -1524,10 +1524,9 @@ dsr1-fp8-b200-sglang-mtp:
 
   # NOTE: At the time of submission, https://cookbook.sglang.io/autoregressive/DeepSeek/DeepSeek-R1
   # does not have a B300-specific recipe, so this config reuses the existing DSR1 FP8
-  # B200 SGLang MTP recipe as-is until B300-specific tuning is available. Image bumped
-  # to v0.5.10.post1-cu130 to match the standard B300 SGLang image used by other B300 configs.
+  # B200 SGLang MTP recipe as-is until B300-specific tuning is available.
 dsr1-fp8-b300-sglang-mtp:
-  image: lmsysorg/sglang:v0.5.12-cu130
+  image: lmsysorg/sglang:v0.5.15.post1-cu130
   model: deepseek-ai/DeepSeek-R1-0528
   model-prefix: dsr1
   runner: b300
diff --git a/perf-changelog.yaml b/perf-changelog.yaml
index 335245a6c3..975c917743 100644
--- a/perf-changelog.yaml
+++ b/perf-changelog.yaml
@@ -5060,3 +5060,9 @@
     - "Re-pin VLLM_ROUTER_IMAGE to vllm/vllm-router:nightly-20260716-1fbcde7 (previous nightly-20260629-e667ebb was garbage-collected from Docker Hub)"
     - "Exclude known-bad nodes mia1-p01-g09,g14 from the disagg node pool"
   pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/2301
+
+- config-keys:
+    - dsr1-fp8-b300-sglang-mtp
+  description:
+    - "Bump SGLang container image from lmsysorg/sglang:v0.5.12-cu130 to lmsysorg/sglang:v0.5.15.post1-cu130 (https://github.com/sgl-project/sglang/releases/tag/v0.5.15.post1)"
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/2313