diff --git a/README.md b/README.md
index dda2731..b553cc2 100644
--- a/README.md
+++ b/README.md
@@ -7,13 +7,13 @@ A set of crates for the construction and use of optimized IP filtering mechanism
 1. Create `private/secret.sh` containing `export IP2LOCATION_TOKEN=''`
 1. Run `./private/dl.sh DB1LITECSV DB1LITECSVIPV6`
 1. List available countries using `cargo run -- -i private/DB1-LITE-V4.CSV list`
-1. Generate a filter using `cargo run -- -i ./private/DB1-LITE-V4.CSV merge -c BD,BR,CN,HK,IL,IN,IQ,IR,KP,PK,QA,RO,RS,RU,SA,SG,SO,SS,SY,TR,TW,UA,DZ -o ./private/filter4.bin`
-1. Generate a filter using `cargo run -- -i ./private/DB1-LITE-V6.CSV merge -c BD,BR,CN,HK,IL,IN,IQ,IR,KP,PK,QA,RO,RS,RU,SA,SG,SO,SS,SY,TR,TW,UA,DZ -6 -o ./private/filter6.bin`
+1. Generate a filter using `cargo run -- -i ./private/DB1-LITE-V4.CSV merge -c CA -o ./private/filter4.bin`
+1. Generate a filter using `cargo run -- -i ./private/DB1-LITE-V6.CSV merge -c CA -6 -o ./private/filter6.bin`
 1. Verify IP ranges using `cargo run -- -i ./private/filter4.bin load` or `cargo run -- -i ./private/filter6.bin load -6`
 
 ###### Round trip checks
-1. `diff <(cargo run -- -i ./private/DB1-LITE-V4.CSV merge -c BD,BR,CN,HK,IL,IN,IQ,IR,KP,PK,QA,RO,RS,RU,SA,SG,SO,SS,SY,TR,TW,UA,DZ) <(cargo run -- -i ./private/filter4.bin load)`
-1. `diff <(cargo run -- -i ./private/DB1-LITE-V6.CSV merge -c BD,BR,CN,HK,IL,IN,IQ,IR,KP,PK,QA,RO,RS,RU,SA,SG,SO,SS,SY,TR,TW,UA,DZ -6) <(cargo run -- -i ./private/filter6.bin load -6)`
+1. `diff <(cargo run -- -i ./private/DB1-LITE-V4.CSV merge -c CA) <(cargo run -- -i ./private/filter4.bin load)`
+1. `diff <(cargo run -- -i ./private/DB1-LITE-V6.CSV merge -c CA -6) <(cargo run -- -i ./private/filter6.bin load -6)`
 
 ## Various builds