diff --git a/backend/python/coqui/requirements-cpu.txt b/backend/python/coqui/requirements-cpu.txt
index 08654a4ca3ef..d0ff96b14da7 100644
--- a/backend/python/coqui/requirements-cpu.txt
+++ b/backend/python/coqui/requirements-cpu.txt
@@ -1,5 +1,5 @@
 --extra-index-url https://download.pytorch.org/whl/cpu
-transformers==4.48.3
+transformers==5.5.3
 accelerate
 torch==2.4.1
 torchaudio==2.4.1
diff --git a/backend/python/coqui/requirements-cublas12.txt b/backend/python/coqui/requirements-cublas12.txt
index 53ed2ebc760c..b6f664c5e4ba 100644
--- a/backend/python/coqui/requirements-cublas12.txt
+++ b/backend/python/coqui/requirements-cublas12.txt
@@ -1,5 +1,5 @@
 torch==2.4.1
 torchaudio==2.4.1
-transformers==4.48.3
+transformers==5.5.3
 accelerate
 coqui-tts
\ No newline at end of file
diff --git a/backend/python/coqui/requirements-hipblas.txt b/backend/python/coqui/requirements-hipblas.txt
index 5a3967d34ded..eac1601728ec 100644
--- a/backend/python/coqui/requirements-hipblas.txt
+++ b/backend/python/coqui/requirements-hipblas.txt
@@ -1,6 +1,6 @@
 --extra-index-url https://download.pytorch.org/whl/rocm7.0
 torch==2.10.0+rocm7.0
 torchaudio==2.10.0+rocm7.0
-transformers==4.48.3
+transformers==5.5.3
 accelerate
 coqui-tts
\ No newline at end of file
diff --git a/backend/python/coqui/requirements-intel.txt b/backend/python/coqui/requirements-intel.txt
index 3a854b87573e..14e1c1726a0b 100644
--- a/backend/python/coqui/requirements-intel.txt
+++ b/backend/python/coqui/requirements-intel.txt
@@ -3,6 +3,6 @@ torch==2.8.0+xpu
 torchaudio==2.8.0+xpu
 optimum[openvino]
 setuptools
-transformers==4.48.3
+transformers==5.5.3
 accelerate
 coqui-tts
\ No newline at end of file
diff --git a/backend/python/coqui/requirements-mps.txt b/backend/python/coqui/requirements-mps.txt
index f2883e9778c8..e46126a1c92f 100644
--- a/backend/python/coqui/requirements-mps.txt
+++ b/backend/python/coqui/requirements-mps.txt
@@ -1,4 +1,4 @@
 torch==2.7.1
-transformers==4.48.3
+transformers==5.5.3
 accelerate
 coqui-tts