diff --git a/go.mod b/go.mod
index 703bccc8..98b76aba 100644
--- a/go.mod
+++ b/go.mod
@@ -18,15 +18,13 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/gorilla/websocket v1.5.3
 	github.com/jackc/pgx/v5 v5.9.1
-	github.com/ledongthuc/pdf v0.0.0-20250511090121-5959a4027728
 	github.com/lib/pq v1.12.3
 	github.com/microcosm-cc/bluemonday v1.0.27
 	github.com/oapi-codegen/gin-middleware v1.0.2
 	github.com/oapi-codegen/runtime v1.3.1
 	github.com/oracle-samples/gorm-oracle v1.1.1
-	github.com/oracle/oci-go-sdk/v65 v65.110.0
+	github.com/oracle/oci-go-sdk/v65 v65.111.0
 	github.com/stretchr/testify v1.11.1
-	github.com/tmc/langchaingo v0.1.14
 	golang.org/x/net v0.52.0
 	golang.org/x/oauth2 v0.36.0
 	golang.org/x/text v0.35.0
diff --git a/go.sum b/go.sum
index 9f4ea719..1d7c38f7 100644
--- a/go.sum
+++ b/go.sum
@@ -251,8 +251,8 @@ github.com/onsi/gomega v1.39.1 h1:1IJLAad4zjPn2PsnhH70V4DKRFlrCzGBNrNaru+Vf28=
 github.com/onsi/gomega v1.39.1/go.mod h1:hL6yVALoTOxeWudERyfppUcZXjMwIMLnuSfruD2lcfg=
 github.com/oracle-samples/gorm-oracle v1.1.1 h1:eXOJ+W0/wCZk/4Rfnxm8UtlnJhIo97YpLtndsFlAmAE=
 github.com/oracle-samples/gorm-oracle v1.1.1/go.mod h1:tbr/EChlYPgrlPeCTuj8ovBbHlhqCqbkaUvyZ4Ly6Ho=
-github.com/oracle/oci-go-sdk/v65 v65.110.0 h1:n5hO4EvcJSsYxyFaAdBNu+pBmsuX2VObZ7g/VEiBDNc=
-github.com/oracle/oci-go-sdk/v65 v65.110.0/go.mod h1:8ZzvzuEG/cFLFZhxg/Mg1w19KqyXBKO3c17QIc5PkGs=
+github.com/oracle/oci-go-sdk/v65 v65.111.0 h1:eDkWg6ZN0uKwWzSekoFcQJhR+C+F/aVdTwr+lGHU9Qk=
+github.com/oracle/oci-go-sdk/v65 v65.111.0/go.mod h1:8ZzvzuEG/cFLFZhxg/Mg1w19KqyXBKO3c17QIc5PkGs=
 github.com/pborman/getopt v0.0.0-20170112200414-7148bc3a4c30/go.mod h1:85jBQOZwpVEaDAr341tbn15RS4fCAsIst0qp7i8ex1o=
 github.com/pelletier/go-toml/v2 v2.3.0 h1:k59bC/lIZREW0/iVaQR8nDHxVq8OVlIzYCOJf421CaM=
 github.com/pelletier/go-toml/v2 v2.3.0/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
@@ -444,7 +444,6 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
@@ -464,5 +463,3 @@ gorm.io/gorm v1.31.1 h1:7CA8FTFz/gRfgqgpeKIBcervUn3xSyPUmr6B2WXJ7kg=
 gorm.io/gorm v1.31.1/go.mod h1:XyQVbO2k6YkOis7C2437jSit3SsDK72s7n7rsSHd+Gs=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
-sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=
-sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=