diff --git a/pkg/pb/credentialspb/credentials.pb.go b/pkg/pb/credentialspb/credentials.pb.go
index c222682b6..930a9446c 100644
--- a/pkg/pb/credentialspb/credentials.pb.go
+++ b/pkg/pb/credentialspb/credentials.pb.go
@@ -7,6 +7,7 @@
 package credentialspb
 
 import (
+	_ "github.com/envoyproxy/protoc-gen-validate/validate"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -511,7 +512,7 @@ type AWSSessionTokenSecret struct {
 
 	Key          string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
 	Secret       string `protobuf:"bytes,2,opt,name=secret,proto3" json:"secret,omitempty"`
-	SessionToken string `protobuf:"bytes,3,opt,name=sessionToken,proto3" json:"sessionToken,omitempty"`
+	SessionToken string `protobuf:"bytes,3,opt,name=session_token,json=sessionToken,proto3" json:"session_token,omitempty"`
 }
 
 func (x *AWSSessionTokenSecret) Reset() {
@@ -824,84 +825,88 @@ var File_credentials_proto protoreflect.FileDescriptor
 var file_credentials_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/pkg/pb/credentialspb/credentials.pb.validate.go b/pkg/pb/credentialspb/credentials.pb.validate.go
index 4c9797300..235affbef 100644
--- a/pkg/pb/credentialspb/credentials.pb.validate.go
+++ b/pkg/pb/credentialspb/credentials.pb.validate.go
@@ -987,11 +987,38 @@ func (m *AWSSessionTokenSecret) validate(all bool) error {
 
 	var errors []error
 
-	// no validation rules for Key
+	if utf8.RuneCountInString(m.GetKey()) < 1 {
+		err := AWSSessionTokenSecretValidationError{
+			field:  "Key",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
 
-	// no validation rules for Secret
+	if utf8.RuneCountInString(m.GetSecret()) < 1 {
+		err := AWSSessionTokenSecretValidationError{
+			field:  "Secret",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
 
-	// no validation rules for SessionToken
+	if utf8.RuneCountInString(m.GetSessionToken()) < 1 {
+		err := AWSSessionTokenSecretValidationError{
+			field:  "SessionToken",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
 
 	if len(errors) > 0 {
 		return AWSSessionTokenSecretMultiError(errors)
@@ -1094,9 +1121,27 @@ func (m *AWS) validate(all bool) error {
 
 	var errors []error
 
-	// no validation rules for Key
+	if utf8.RuneCountInString(m.GetKey()) < 1 {
+		err := AWSValidationError{
+			field:  "Key",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
 
-	// no validation rules for Secret
+	if utf8.RuneCountInString(m.GetSecret()) < 1 {
+		err := AWSValidationError{
+			field:  "Secret",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
 
 	// no validation rules for Region
 
diff --git a/proto/credentials.proto b/proto/credentials.proto
index 90c54d460..327c03fd4 100644
--- a/proto/credentials.proto
+++ b/proto/credentials.proto
@@ -4,6 +4,8 @@ package credentials;
 
 option go_package = "github.com/trufflesecurity/trufflehog/v3/pkg/pb/credentialspb";
 
+import "validate/validate.proto";
+
 message Unauthenticated {}
 
 message SSHAuth {}
@@ -46,14 +48,14 @@ message KeySecret {
 }
 
 message AWSSessionTokenSecret {
-  string key = 1;
-  string secret = 2;
-  string sessionToken = 3;
+  string key = 1 [(validate.rules).string.min_len = 1];
+  string secret = 2 [(validate.rules).string.min_len = 1]; 
+  string session_token = 3 [(validate.rules).string.min_len = 1];
 }
 
 message AWS {
-  string key = 1;
-  string secret = 2;
+  string key = 1 [(validate.rules).string.min_len = 1];
+  string secret = 2 [(validate.rules).string.min_len = 1];
   string region = 3;
 }